Service Manual2005 LIGHTING SYSTEMS

SECTION 9B

LIGHTING SYSTEMS

Caution : Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise noted.

SPECIFICATIONS

Bulb Usage Chart

Bulb	Wattages
Ashtray Lamp	1.2W
Backup Lamp	21W
Center High-Mounted Stoplamp	27W
Front Door Step Lamp	5W
Front Fog Lamp	55W
Glove Box Lamp	5W
Headlamp (high/low)	55W/55W
Ignition Switch Keyhole Lamp	5W
Interior Courtesy Lamp	10W
License Plate Lamp	5W
Luggage Compartment Lamp	5W
Map Lamp	8W
Parking and Front Turn Signal Lamp	Double 28/8W
Rear Turn Signal Lamp	21W
Side Turn Signal Lamp	5W
Taillamps/Stoplamp	Double 21/5W
Vanity Mirror Lamp	5W

Fastener Tightening Specifications

Application	N•m	Lb-Ft	Lb-In
Ashtray Housing Screws	2.5	-	22
Daytime Running Lamp Module Screws	4	-	35
Fog Lamp Assembly Nuts	3	-	27
Front Door Trim Panel Screws	3.5	-	31
Headlamp Assembly Bolts	7.5	-	66
Ignition Switch Keyhole Lamp Screw	2.5	-	22
Interior Courtesy Lamp Housing Screw	2	-	18
License Plate Lamp Assembly Screws	4	-	35
Rear Combination Lamp Assembly Nuts	3	-	27
Steering Column Trim Cover Screws	2.5	-	22

SCHEMATIC AND ROUTING DIAGRAMS

Light-On Reminder Chime Circuit

Headlamps and Headlamp Levelling Circuit

Daytime Running Lamps Circuit

Fog Lamps Circuit

Tail and License Lamps Circuit

Stop and Backup Lamps Circuit

Turn Signal and Hazard Lamps Circuit

Interior Courtesy and Luggage Compartment Lamps Circuit

Glove Box Lamp, Ashtray Lamp and Cigar Lighter Circuit

Battery Saver Circuit

DIAGNOSIS

Light-On Reminder Chime

Diagnostic Aids

Fuse EF20 controls the instrument cluster lighting and the right side taillamps, parking lamps, and marker lamps. It also provides the input to the chime module for the lighting reminder.

Test Description

The number below refers to Step 3 on the diagnostic table.

The chime module is under the instrument panel on the left side.

Headlamps-On Reminder Chime Is Inoperative

Step	Action	Value(s)	Yes	No
1	Turn the parking lamps and the taillamps on. Verify that the parking and taillamps are working on the right side of the vehicle. Are the parking lamps and taillamps working on the right side of the vehicle?	-	Go to Step 3	Go to Step 2
2	Repair the parking lamps and the taillamps before completing this diagnostic table. Does the headlamps-on reminder chime in the ISU work after the parking lamps and the taillamps have been repaired?	-	System OK	Go to Step 3
3	Disconnect the ISU electrical connector. Turn the headlamps on. Check the voltage at terminal B27 of the ISU. Is the voltage equal to the specified value?	11-14 v	Go to Step 7	Go to Step 4
4	Remove the dimmer switch from the instrument panel for testing, but do not disconnect the electrical connector. Turn the headlamps on. Check the voltage at terminal 3 of the three-pin dimmer switch connector. Is the voltage equal to the specified value?	11-14 v	Go to Step 5	Go to Step 6
5	Repair the open circuit wire between the dimmer switch connector terminal 3 and the ISU connector terminal B27. Is the repair complete?	-	System OK	-
6	Repair the open circuit between fuse EF21 and the dimmer switch. Is the repair complete?	-	System OK	-
7	Use an ohmmeter to check the continuity between ground and terminal B27 of the ISU connector. Does the ohmmeter indicate the specified value?	~0Ω	Go to Step 9	Go to Step 8
8	Repair the open circuit between ground and terminal B27 of the ISU connector. Is the repair complete?	-	System OK	-
9	Open the driver door. Connect an ohmmeter between ground and terminal B3 of the ISU connector. Does the ohmmeter indicate the specified value?	~0Ω	Go to Step 11	Go to Step 10
10	Repair the open circuit between ground and terminal B3 of the ISU connector. (The door open switch should be closed when the door is open.) Is the repair complete?	-	System OK	-
11	Replace the ISU. Is the repair complete?	-	System OK	-

Headlamps

Low-Beam Headlamps Are Inoperative, High-Beam Headlamps Are OK

Step	Action	Value(s)	Yes	No
1	Check fuses EF13 (left-side headlamps) and EF10 right-side headlamps). Is fuse EF13 or EF10 blown?	-	Go to Step 2	Go to Step 3
2	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
3	Check the voltage at fuses EF13 and EF10. Does the voltage available at fuses EF13 and EF10 equal the value specified?	11-14 v	Go to Step 4	Go to Step 9
4	Disconnect both headlamp connectors. Turn the headlamps on. Select the low beams. Does the voltage at each headlamp connector terminal 5 equal the value specified?	11-14 v	Go to Step 6	Go to Step 5
5	Repair the open circuit between fuse EF13 or EF10 and the low-beam headlamps. Is the repair complete?	-	System OK	-
6	Disconnect the headlamp connectors. Connect an ohmmeter between ground and either headlamp connector terminal 6. Is the resistance equal to the value specified?	0 Ω	Go to Step 8	Go to Step 7
7	Repair the ground circuit. Is the repair complete?	-	System OK	-
8	Replace the faulty headlamps. Is the repair complete?	-	System OK	-
9	Check the voltage between fuses EF13 and EF10 and the headlamp relay. Does the voltage available at fuses EF13 and EF10 equal the specified value?	11-14 v	System OK	Go to Step 10
10	Repair the open circuit between fuses EF13 and EF10 and the headlamp relay. Is the repair complete?	-	System OK	-

High-Beam Headlamps Are Inoperative, Low-Beam Headlamps Are OK

Step	Action	Value(s)	Yes	No
1	Turn the high-beam headlamps on. Check the voltage at headlamp switch terminal 6 with high beams selected. Does the voltage available at the headlamp switch terminal 6 equal the value specified?	11-14 v	Go to Step 3	Go to Step 2
2	Repair the open circuit between fuse EF16 and the headlamp switch. Is the repair complete?	-	System OK	-
3	Check for a short circuit. Repair it if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
4	Disconnect the headlamp switch. Put the switch in the high-beam position. Use an ohmmeter to check the continuity of the headlamp switch between terminals 6 and 4. Does the ohmmeter indicate the specified value?	0Ω	Go to Step 6	Go to Step 5
5	Replace the headlamp switch. Is the repair complete?	-	System OK	-
6	Disconnect the high-beam headlamp connectors. Turn the high-beam headlamps on. Use a voltmeter to check the voltage at terminal 4 of the headlamp connectors. Does the voltmeter indicate the specified value?	11-14 v	Go to Step 8	Go to Step 7
7	Repair the open circuit between the fuse block and the high-beam headlamps. Is the repair complete?	-	System OK	-
8	Use an ohmmeter to check continuity between terminal 6 of the headlamp connectors and ground. Does the ohmmeter indicate the specified value?	≈ 0 Ω	Go to Step 10	Go to Step 9
9	Repair the open ground circuit. Is the repair complete?	-	System OK	-
10	Replace the faulty high-beam headlamps. Is the repair complete?	-	System OK	-

High-Beam and Low-Beam Headlamps Are Inoperative on Both Left and Right Sides

Diagnostic Aids: If there are several other systems inoperative with the ignition ON, such as power windows, power seats, sunroof, and front turn signals, check ground G101.

Step	Action	Value(s)	Yes	No
1	Check fuses F12, EF16, EF14, EF10 and EF13. Are any fuses blown?	-	Go to Step 2	Go to Step 3
2	Check for a short circuit and repair it, if necessary. Replace the blown fuse. Is the repair complete?	-	System OK	-
3	Use a voltmeter to check voltage at EF12. Does the voltmeter indicate the specified value?	11-14 v	Go to Step 5	Go to Step 4
4	Repair the open power supply circuit to fuse EF12. Is the repair complete?	-	System OK	-
5	Turn the headlamps on. Are the parking lamps, taillamps, and license lamps working?	-	Go to Step 6	Go to Step 8
6	Temporarily substitute the illumination relay in place of the headlamp relay. Do the headlamps operate with the substituted relay?	-	Go to Step 7	Go to Step 8
7	Reinstall the illumination relay in its original position. Replace the headlamp relay. Is the repair complete?	-	System OK	-
8	Disconnect the headlamp connectors, and use an ohmmeter to check continuity between terminals 1 and 6 and ground. Repeat this procedure on the other side. Connect the headlamp connectors. Does the ohmmeter indicate the specified value between each terminal and ground?	~0Ω	Go to Step 10	Go to Step 9
9	Repair the open circuit between the headlamps and ground. Is the repair complete?	-	System OK	-
10	Disconnect light switch connector. Turn the headlamps on. Using a voltmeter, check voltage at light switch connector terminal 3 (harness side). Is the voltage equal to the specified value?	11-14 v	Go to Step 12	Go to Step 11
11	Repair the open circuit between the light relay and the light switch. Is the repair complete?	-	System OK	-
12	Use an ohmmeter to check continuity between lightswitch connector, terminal 2 (harness side) and ground. Did the ohmmeter indicate the specified value?	~0Ω	Go to Step 14	Go to Step 13
13	Repair the open circuit between light switch connector and ground. Is the repair complete?	-	System OK	-
14	Replace the light switch. Is the repair complete?	-	System OK	-

Daytime Running Lamps

Diagnostic Aids

The daytime running lamp (DRL) system will not work if the parking brake is applied. The system is designed to work only when the engine is running and the parking brake released. If the parking brake circuit is shorted to ground or the switch stays closed when the engine is running, the DRL system will not work.

Daytime Running Lamps Do Not Turn on

Step	Action	Value(s)	Yes	No
1	Turn the headlamps on. Do the headlamps, parking lamps, taillamps, and instrument lamps work?	-	Go to Step 3	Go to Step 2
2	Repair the regular headlamp system before completing this diagnostic table. Does the DRL system work after the headlamps, exterior lamps, and instrument lamp systems have been repaired?	-	System OK	Go to Step 3
3	Check fuses EF26 and EF21. Is fuse EF26 or EF21 blown?	-	Go to Step 4	Go to Step 5
4	Check for a short circuit and repair if necessary. Replace any blown fuse. Is the repair complete?	-	System OK	-
5	Turn the ignition ON. Check the voltage at fuses EF26 and EF21. Does the voltage equal the specified value?	11-14 v	Go to Step 7	Go to Step 6
6	Repair the power supply circuit for fuse EF26 and/or EF21. Is the repair complete?	-	System OK	-
7	Disconnect the electrical connector from the DRL module. Turn the ignition ON. Check the voltage at terminal 2 of the DRL module. Is the voltage equal to the specified value?	11-14 v	Go to Step 9	Go to Step 8
8	Repair the open circuit between fuse EF21 and terminal 2 of the DRL module connector. Is the repair complete?	-	System OK	-
9	With the electrical connector still disconnected from the DRL module, check the voltage at terminal 8 of the DRL module. Is the voltage equal to the specified value?	11-14 v	Go to Step 11	Go to Step 10
10	Repair the open circuit between fuse EF26 and terminal 8 of the DRL module connector. Is the repair complete?	-	System OK	-
11	With the DRL module still disconnected, use an ohmmeter to check the resistance between ground and terminal E of the DRL module connector. Is the resistance equal to the specified value?	~0Ω	Go to Step 13	Go to Step 12
12	Repair the circuit between ground and terminal 4 of the DRL module connector. Is the repair complete?	-	System OK	-
13	Release the parking brake. Turn the ignition switch on. Observe the parking brake indicator lamp. Is the parking brake indicator lamp on?	-	Go to Step 14	Go to Step 17
14	Disconnect the electrical connector to the parking brake lever switch. Is the parking brake indicator lamp still on?	-	Go to Step 15	Go to Step 16
15	Repair the wire short to ground in the parking brake circuit. Is the repair complete?	-	System OK	-
16	Replace the parking brake lever switch. Is the repair complete?	-	System OK	-
17	Replace the DRL module. Is the repair complete?	-	System OK	-

Headlamp Leveling

Test Description

The number(s) below refer to step(s) on the diagnostic table.

The headlamp leveling switch can be removed for testing if the driver side instrument panel cover is carefully pulled loose from its retaining clips. By reaching behind the loosened trim panel, the retaining tabs for the headlamp leveling and dimmer switch can be pressed to release the switch from the instrument panel.

Headlamp Leveling Is Inoperative

Step	Action	Value(s)	Yes	No
1	Check the high- and the low-beam headlamps. Do the high- and the low-beam headlamps work?	-	Go to Step 3	Go to Step 2
2	Repair the high- and the low-beam headlamps before completing this diagnostic table. Does the leveling system operate after the headlamps have been repaired?	-	System OK	Go to Step 3
3	Disconnect the connector at the inoperative headlamp leveling motor. Turn the low-beam headlamps ON. Check the voltage at the YEL wire at the left headlamp leveling motor connector (or the BRN/WHT wire at the right headlamp leveling motor connector). Does the voltmeter indicate the specified value?	11-14 v	Go to Step 5	Go to Step 4
4	Repair the open circuit between the low-beam headlamp and the headlamp leveling motor. Is the repair complete?	-	System OK	-
5	Use an ohmmeter to check continuity between the BLK wire at the headlamp leveling motor connector and ground. Does the ohmmeter indicate the specified value?	~0Ω	Go to Step 7	Go to Step 6
6	Repair the open circuit between the headlamp leveling motor connector and ground. Is the repair complete?	-	System OK	-
7	Turn the low beam headlamps ON. At the headlamp leveling motor connector, check the voltage while the leveling adjustment is changed from 0" to 3" on the leveling switch. Does the voltage change smoothly and match the values specified?	11 - 14 v at position "0" to 4.5 v at position "3"	Go to Step 8	Go to Step 9
8	Replace the headlamp leveling motor. Is the repair complete?	-	System OK	-
9	Remove the headlamp leveling switch for testing, but do not disconnect the electrical connector. Turn the low-beam headlamps ON. Check the voltage at the BRN wire at the headlamp leveling switch. Is the voltage equal to the specified value?	11 - 14 v	Go to Step 13	Go to Step 10
10	Remove the headlamp switch for testing, but leave the electrical connectors connected. Turn the low-beam headlamps ON. Check the voltage at the BRN wire at the headlamp and turn signal switch seven-pin connector. Does the voltage equal the specified value?	11 - 14 v	Go to Step 12	Go to Step 11
11	Replace the headlamp switch. Is the repair complete?	-	System OK	-
12	Repair the open circuit in the BRN wire between the headlamp switch and the headlamp leveling switch. Is the repair complete?	-	System OK	-
13	Turn the low-beam headlamps ON. With the headlamp leveling switch removed for testing and the electrical connector still connected, check the voltage at the DK GRN wire at the headlamp leveling switch with the switch dial set at "0." With the headlamp leveling switch removed for testing and the electrical connector still connected, check the voltage at the DK GRN wire at the headlamp leveling switch with the switch dial set at "0."	11 - 14 v	Go to Step 15	Go to Step 14
14	Replace the headlamp leveling switch. Is the repair complete?	-	System OK	-
15	Turn the low-beam headlamps ON. With the headlamp leveling switch removed for testing and the electrical connector still connected, check the voltage at the DK GRN wire at the headlamp leveling switch as the switch is dialed to "3." Does the drop in voltage equal the specified value?	4.5 v	Go to Step 16	Go to Step 14
16	Repair the open DK GRN wire between the headlamp leveling switch and the headlamp leveling motors. Is the repair complete?	-	System OK	-

Fog Lamps

Front Fog Lamps Inoperative

Step	Action	Value(s)	Yes	No
1	Remove the fog lamp relay and temporarily substitute a known good relay such as the headlamp relay or the illumination lamp relay. Do the fog lamps work with the substituted relay?	-	Go to Step 6	Go to Step 7
2	Return the substituted relay to its original position. Replace the inoperative fog lamp relay. Is the repair complete?	-	System OK	-
3	Return the substituted relay to its original position, but do not reinstall the fog lamp relay. Using a voltmeter or test lamp, check the fog lamp relay socket terminal 30. Does the battery voltage available at the fog lamp relay socket equal the specified value?	11-14 v	Go to Step 9	Go to Step 8
4	Repair the open circuit between the battery(+) and the fog lamp relay. Is the repair complete?	-	System OK	-
5	At the fog lamp relay socket, use an ohmmeter or test lamp to verify that the connector for relay terminal 86 is connected to ground. Does the resistance equal the specified value?	0Ω	Go to Step 11	Go to Step 10
6	Repair the ground circuit for the fog lamp relay. Is the repair complete?	-	System OK	-
7	With the fog lamp relay reinstalled and the switch on, test for voltage at the fog lamp connector. Does the battery voltage available at the fog lamp connector equal the specified value?	11-14 v	Go to Step 13	Go to Step 12
8	Repair the open circuit between the fog lamp relay terminal 87 and the fog lamps. Is the repair complete?	-	System OK	-
9	Use an ohmmeter or test lamp to check the ground at the ground side of the fog lamp connector. Does the resistance equal the specified value?	0Ω	Go to Step 15	Go to Step 14
10	Repair the fog lamp ground circuit. Is the repair complete?	-	System OK	-
11	Replace the faulty fog lamp bulbs. Is the repair complete?	-	System OK	-

Rear Fog Lamps Are Inoperative

Diagnostic Aids

The rear fog lamps will not operate unless the headlamps or the front fog lamps are ON.

The rear fog lamp indicator in the instrument cluster can shorten the diagnostic process. If the instrument cluster indicator comes ON, but the rear fog lamps do not come ON, the problem is either an open circuit between the rear fog lamp relay and the lamps, faulty lamps, or a bad ground for the rear fog lamps.

Test Description

The number(s) below refer to step(s) on the diagnostic table.

The front fog lamps will not turn ON unless the parking lamps or headlamps are ON.
The rear fog lamp relay is located in the relay area under the instrument panel.
The rear fog lamp switch is powered through a diode which is taped to the body wiring harness near the instrument panel fuse block. If it is necessary to test power at the diode, remove the driver kick panel.

Step	Action	Value(s)	Yes	No
1	Check the headlamps and the front fog lamps. Do the headlamps and the front fog lamps operate?	-	Go to Step 3	Go to Step 2
2	Repair the headlamps or the front fog lamps before completing this diagnostic table. Do the rear fog lamps work after the headlamps or the front fog lamps have been repaired?	-	System OK	Go to Step 3
3	Remove the rear fog lamp bulbs. Turn the headlamps ON. Turn the rear fog lamp switch ON. Check the voltage at the RED wire to the rear fog lamp bulbs. Is the voltage equal to the specified value?	11 - 14 v	Go to Step 4	Go to Step 7
4	With the rear fog lamp bulbs removed, use an ohmmeter to check the continuity between the BLK wire at the rear fog lamps and ground. Does the ohmmeter indicate the specified value?	≈ 0 Ω	Go to Step 6	Go to Step 5
5	Repair the faulty BLK wire between the rear fog lamps and ground. Is the repair complete?	-	System OK	-
6	Replace the faulty fog lamp bulbs. Is the repair complete?	-	System OK	-
7	Check fuses EF14. Is either fuse blown?	-	Go to Step 8	Go to Step 9
8	Check for a short circuit and repair if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
9	Check the voltage at EF14. Is the voltage equal to the specified value?	11 - 14 v	Go to Step 11	Go to Step 10
10	Repair the power supply circuit to the fuses. Is the repair complete?	-	System OK	-
11	Remove the rear fog lamp relay. Probe the relay socket terminal 30 with a voltmeter. Is the voltage equal to the specified value?	11 - 14 v	Go to Step 12	Go to Step 7
12	Repair the open circuit between fuse EF14 and terminal 30 of the rear fog lamp relay. Is the repair complete?	-	System OK	-
13	With the rear fog lamp relay still disconnected, turn the headlamps ON. Probe the rear fog lamp relay socket terminal 15. Is the voltage equal to the specified value?	11 - 14 v	Go to Step 23	Go to Step 14
14	Remove the rear fog lamp switch for testing, but do not disconnect the electrical connector. Turn the headlamps ON. Check the voltage at the BRN/WHT wire at the rear fog lamp switch. Is the voltage equal to the specified value?	11 - 14 v	Go to Step 15	Go to Step 18
15	With the rear fog lamp switch removed for testing, turn the headlamps ON. Turn the rear fog lamp switch to the ON position. Check the voltage at the YEL wire at the rear fog lamp switch. Is the voltage equal to the specified value?	11 - 14 v	Go to Step 16	Go to Step 17
16	Repair the open circuit between the rear fog lamp switch and the rear fog lamp relay terminal E. Is the repair complete?	-	System OK	-
17	Replace the rear fog lamp switch. Is the repair complete?	-	System OK	-
18	Turn the headlamps ON. Check the voltage at the LT BLU wire at the fuse EF16. Is the voltage equal to the specified value?	11 - 14 v	Go to Step 20	Go to Step 19
19	Repair the open circuit between the fuse EF16 and the headlamp relay. Is the repair complete?	-	System OK	-
20	Check fuse EF16. Is EF16 blown?	-	Go to Step 21	Go to Step 22
21	Check for a short circuit and repair if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
22	Turn the headlamps ON. Check the voltage at the LT BLU wire at the fuse EF16. Is the voltage equal to the specified value?	11 - 14 v	Go to Step 21	Go to Step 22
23	Repair the open circuit between the fuse EF16 and the rear fog lamp switch. Is the repair complete?	-	System OK	-
24	Temporarily substitute a known good relay in place of the rear fog lamp relay. Turn the headlamps ON. Turn the rear fog lamp switch to the ON position. Do the rear fog lamps work with the substituted relay?	-	Go to Step 24	Go to Step 25
25	Return the substituted relay to its original position. Replace the rear fog lamp relay. Is the repair complete?	-	System OK	-
26	Connect a jumper wire between terminal 30 and terminal 87 at the rear fog lamp relay socket. Do the rear log lamps turn ON?	-	Go to Step 26	Go to Step 27

Tail/Stop/Turn/Backup Lamps

Taillamps and/or Side Turn Signal Lamps Do Not Work

Notice : When probing a bulb socket with a voltmeter or a test lamp, do not contact the side of the socket (ground) when you are testing the positive contact at the bottom of the socket. If the voltage and the ground are both available at the bulb socket, contacting both at the same time with a test probe will cause a blown fuse.

Step	Action	Value(s)	Yes	No
1	Check the headlamps. Do the headlamps work?	-	Go to Step 3	Go to Step 2
2	Repair the headlamps. Are the rear combination lamps still inoperative?	-	Go to Step 3	System OK
3	Turn the taillamps and side turn signal lamps on. Use a voltmeter to check voltage at the bulb socket positive terminal. Does voltage at the bulb socket equal the specified value?	11-14 v	Go to Step 4	Go to Step 7
4	Connect an ohmmeter between ground and the lamp socket negative terminal. Is the resistance equal to the specified value?	0Ω	Go to Step 6	Go to Step 5
5	Repair the ground circuit for the lamps. Is the repair complete?	-	System OK	-
6	Replace the faulty bulbs. Is the repair complete?	-	System OK	-
7	Check fuses EF20, and EF21. Is any of the fuses blown?	-	Go to Step 8	Go to Step 9
8	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
9	Turn the headlamps on. Check the voltage at ISU connector terminal C8 for the left-side taillamp and sidemarker lamp and ISU connector terminal C4 for the right-side taillamp and sidemarker lamp. Does the voltage at the connector equal the specified value?	11-14 v	Go to Step 23	Go to Step 10
10	Check the ISU. Replace the ISU. Is the repair complete?	-	System OK	-
11	Repair the open circuit between the fuses EF20 and EF21 and the taillamps and/or side turn signal lamps. Is the repair complete?	-	System OK	-

Stoplamps Do Not Work

Step	Action	Value(s)	Yes	No
1	Check fuse EF19. Is fuse EF19 blown?	-	Go to Step 2	Go to Step 3
2	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
3	Press the brake pedal down. Check the positive terminals of the bulb sockets with a test lamp. Does the test lamp illuminate?	-	Go to Step 4	Go to Step 6
4	Connect an ohmmeter between ground and the stoplamp ground terminal. Is the resistance equal to the specified value?	0Ω	Go to Step 6	Go to Step 5
5	Repair the ground circuit. Is the repair complete?	-	System OK	-
6	Disconnect the wiring connector from the stoplamp switch. Press the brake pedal down. Use an ohmmeter to check continuity between terminals 3 and 4. Is the resistance equal to the specified value?	0Ω	Go to Step 8	Go to Step 7
7	Replace the stoplamp switch. Is the repair complete?	-	System OK	-
8	Disconnect the stoplamp switch electrical connector. Check the voltage at terminal 3. Does the voltmeter show the specified value?	11-14 v	Go to Step 10	Go to Step 9
9	Repair the open circuit between the fuse EF19 and the stoplamp switch. Is the repair complete?	-	System OK	-
10	Repair the open circuit between the stoplamp switch and the stoplamps. Is the repair complete?	-	System OK	-

Backup Lamps Inoperative

Step	Action	Value(s)	Yes	No
1	Check fuse F4. Is fuse F4 blown.?	-	Go to Step 2	Go to Step 3
2	Check for a short circuit and repair it, if necessary. Replace fuse F4. Is the repair complete?	-	System OK	-
3	Use a voltmeter to verify that battery voltage is available at fuse F4. Does the voltmeter indicate the specified value?	11-14 v	Go to Step 5	Go to Step 4
4	Repair the power supply circuit for fuse F4. Is the repair complete?	-	System OK	-
5	Remove and examine the backup lamp bulbs. Test the bulbs by connecting them to the vehicle battery with jumper wires. Are the bulbs defective?	-	Go to Step 6	Go to Step 7
6	Replace the defective bulbs. Is the repair complete?	-	System OK	-
7	Reinstall the backup lamps after testing. Turn the ignition ON. Disconnect the backup switch connector. Check the voltage at terminal 1 of the backup switch (or terminal 7 of the park/neutral position switch if the vehicle has an automatic transaxle). Does the voltmeter indicate the specified value?	11-14 v	Go to Step 9	Go to Step 8
8	Repair the open circuit between fuse F4 and the backup switch. Is the repair complete?	-	System OK	-
9	Turn the ignition ON. Apply the parking brake. Block the wheels to prevent the vehicle from moving. Put the transaxle in REVERSE. Use a voltmeter to check voltage at terminal 2 of the backup switch (or terminal 8 of the park/neutral position switch if the vehicle has an automatic transaxle). Does the voltmeter indicate the specified value?	11-14 v	Go to Step 11	Go to Step 10
10	Replace the backup switch. Is the repair complete?	-	System OK	-
11	Remove one of the backup lamps. Turn the ignition ON. Apply the parking brake. Block the wheels to prevent the vehicle from moving. Put the transaxle in REVERSE. Use a voltmeter to check voltage at the positive terminal of the backup lamp socket. Does voltage at the lamp socket equal the specified value?	11-14 v	Go to Step 12	Go to Step 13
12	Repair the ground circuit of the backup lamps. Is the repair complete?	-	System OK	-
13	Repair the open circuit between the backup lamps and the backup switch. Is the repair complete?	-	System OK	-

Turn Signal Lamps and Hazard Lamps Do Not Work

Step	Action	Value(s)	Yes	No
1	Check fuses EF20 and EF21. Is any fuse blown?	-	Go to Step 2	Go to Step 3
2	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
3	Turn the ignition on. Check the voltage at fuse EF20 and EF21. Does the battery voltage available at these fuses equal the specified value?	11-14 v	Go to Step 4	Go to Step 7
4	Turn the hazard lamp switch on. Remove each of the inoperative lamps from its socket. Test each lamp socket positive terminal with a voltmeter. Does the battery voltage pulsing at the turn-signal, hazard-lamp socket positive terminal equal the specified value?	-	Go to Step 5	Go to Step 9
5	At each bulb socket, use an ohmmeter to check the ground circuit. Is the resistance equal to the specified value?	0Ω	Go to Step 6	Go to Step 8
6	Replace any faulty turn signal/ hazard bulbs. Is the repair complete?	-	System OK	-
7	Repair the power supply circuit to fuses. Is the repair complete?	-	System OK	-
8	Repair the open ground circuit. Is the repair complete?	-	System OK	-
9	Turn on the hazard switch. Check the ISU. Is the repair complete?	-	System OK	-
10	Disconnect the hazard switch connector. Check for voltage at terminal 8. Turn the ignition ON. Check for voltage at terminal 8. Does the battery voltage available at both terminals equal the specified value?	11-14 v	Go to Step 11	Go to Step 13
11	Remove the hazard switch. Turn the hazard switch to the off position. Check for continuity between terminals 7 and 8. Turn the hazard switch on. Check for continuity between terminals 7 and 8. Do both tests show the specified value?	0Ω	System OK	Go to Step 12
12	Replace the faulty hazard switch. Is the repair complete ?	-	System OK	-
13	Repair the open circuit between the hazard switch and the fuses EF20 and EF21. Is the repair complete?	-	System OK	-

Interior Courtesy and Luggage Compartment Lamps

Interior Courtesy Lamp Inoperative

Caution : Always make sure there is an electrical load, such as a lamp bulb, in any circuit between battery terminals. Do not make a short circuit between battery terminals with a jumper wire, or hazardous sparking will result.

Test Description

The number below refers to Step 1 on the diagnostic table.

Bulb test. Clip one end of a jumper wire to the negative battery terminal. Clip the other end of the jumper wire onto one end of the bulb. Take the end of the bulb without the jumper attached and touch it to the positive battery terminal.

Step	Action	Value(s)	Yes	No
1	Remove the interior courtesy lamp bulb and inspect the filament. If the filament is not broken, test the bulb using the vehicle’s battery and a jumper wire. Does the bulb pass the visual and physical checks?	-	Go to Step 3	Go to Step 2
2	Replace the bulb. Is the repair complete?	-	System OK	-
3	Reinstall the interior courtesy lamp bulb. Check fuses EF11. Is either fuse EF11 blown?	-	Go to Step 4	Go to Step 5
4	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
5	Disconnect the interior courtesy lamp electrical connector. Check the voltage at connector terminal 3. Does the voltage at connector terminal 3 equal the value specified?	11-14 v	Go to Step 6	Go to Step 7
6	Repair the open circuit between fuse EF11 and the interior courtesy lamp terminal 3. Is the repair complete?	-	System OK	-
7	Use an ohmmeter to check the resistance between the interior courtesy lamp connector 1 and ground on the harness side. Is the resistance equal to the specified value?	0Ω	Go to Step 8	Go to Step 9
8	Replace the interior courtesy lamp switch assembly. Is the repair complete?	-	System OK	-
9	Repair the ground circuit for the interior courtesy lamp. Is the repair complete?	-	System OK	-

Luggage Compartment Lamp Inoperative

The number below refers to Step 1 on the diagnostic table.

Bulb test. Clip one end of a jumper wire to the negative battery terminal. Clip the other end of the jumper wire onto one end of the bulb. Take the end of the bulb without the jumper attached and touch it to the positive battery terminal.
Bulb test. Clip one end of a jumper wire to the negative battery terminal. Clip the other end of the jumper wire onto one end of the bulb. Take the end of the bulb without the jumper attached and touch it to the positive battery terminal.

Step	Action	Value(s)	Yes	No
1	Remove the luggage compartment lamp bulb and inspect the filament. If the filament is not broken, test the bulb using the vehicle’s battery and a jumper wire. Does the bulb pass the visual and physical check?	-	Go to Step 3	Go to Step 2
2	Replace the bulb. Is the repair complete?	-	System OK	-
3	Reinstall the luggage compartment lamp bulb. Check fuse EF11. Is fuse EF11 blown?	-	Go to Step 4	Go to Step 5
4	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
5	Check the voltage at fuse EF11. Does the voltage at fuse EF11 equal the specified value?	11-14 v	Go to Step 7	Go to Step 6
6	Repair the open circuit between the battery and fuse EF11. Is the repair complete?	-	System OK	-
7	Disconnect the luggage compartment lamp electrical connector. Check the voltage at the ORN wire. Does the voltage at the ORN wire equal the specified value?	11-14 v	Go to Step 8	Go to Step 9
8	Repair the open circuit between fuse EF11 and the luggage compartment lamp. Is the repair complete?	-	System OK	-
9	Reconnect the luggage compartment lamp. Remove the luggage compartment lamp switch. With a voltmeter or test lamp, test the circuit wire, terminal 2, at the luggage compartment lamp switch. Does the voltage at the luggage compartment lamp switch equal the specified value?	11-14 v	Go to Step 11	Go to Step 10
10	Repair the open circuit between the luggage compartment lamp and the luggage compartment lamp switch. Is the repair complete?	-	System OK	-
11	Use an ohmmeter to check the resistance between ground and the luggage compartment lamp switch. Is the resistance equal to the specified value?	0Ω	Go to Step 12	Go to Step 13
12	Replace the luggage compartment lamp switch. Is the repair complete?	-	System OK	-
13	Repair the ground circuit for the luggage compartment lamp switch. Is the repair complete?	-	System OK	-

Ignition Key Illumination Lamp Is Inoperative

Diagnostic Aids

In a vehicle equipped with a sunroof, the interior courtesy lamp is near the rearview mirror and also serves as a map lamp. In a non-sunroof vehicle, the interior courtesy lamp is in the roof in the middle of the passenger compartment. There are separate map lamps near the rearview mirror.

There is a timer in the interior courtesy lamp that will only supply a ground to the key illumination lamp for a few seconds after a door is opened and closed.

Test Description

The number below refers to Step 5 on the diagnostic table.

The resistance of the key illumination bulb and attached harness is approximately 14.1 ohms.

Step	Action	Value(s)	Yes	No
1	Set the switch on the courtesy lamp so that it comes on when a door is opened. Check the function of the courtesy lamp. Is the courtesy lamp operating?	-	Go to Step 3	Go to Step 2
2	Repair the interior courtesy lamp system. Does the key illumination lamp function?	-	System OK	Go to Step 3
3	Remove the lower steering column cover to gain access to the connectors for the ignition switch. Disconnect the connector to the key illumination lamp. Check the voltage at terminal 1 of the key illumination lamp connector. Is the voltage equal to the specified value?	11-14 v	Go to Step 5	Go to Step 4
4	Repair the open circuit between fuse EF11 and the ignition key illumination lamp connector. Is the repair complete?	-	System OK	-
5	Remove the key illumination lamp and the attached wires and connector. Use a vehicle battery and jumper wires to directly power the illumination lamp through its attached connector and wires. Does the key illumination lamp turn on when it is directly connected to power and ground from a battery?	-	Go to Step 9	Go to Step 6
6	Check the key illumination lamp bulb. Is the bulb defective?	-	Go to Step 7	Go to Step 8
7	Replace the key illumination lamp bulb. Is the repair complete?	-	System OK	-
8	Replace the lamp socket and the attached wires and connector. Is the repair complete?	-	System OK	-
9	Remove the courtesy lamp. Disconnect the electrical connector of the courtesy lamp. Connect an ohmmeter between key illumination connector terminal 2 and ISU connector terminal B11. Does the ohmmeter indicate the specified value?	~0Ω	Go to Step 11	Go to Step 10
10	Repair the open circuit between the key illumination connector and the ISU connector. Is the repair complete?	-	System OK	-
11	Replace the courtesy lamp. Is the repair complete?	-	System OK	-

Vanity Mirror Lighting Is Inoperative

Diagnostic Aids

If the vanity mirror lighting is working on one side of a mirror but not on the other side, check the lamp bulb. If the vanity mirror lighting is working on one side of the car but not on the other side, begin the diagnostic table at Step 3.

Test Description

The numbers below refer to steps on the diagnostic table.

In a vehicle equipped with a sunroof, the interior courtesy lamp is near the rearview mirror. It also serves as a map lamp. In a non-sunroof vehicle, the interior courtesy lamp is in the roof in the middle of the passenger compartment. There are separate map lamps near the rearview mirror. The vanity mirror lamps have the same fuse and ground as the courtesy lamp.
The resistance of a vanity mirror lamp bulb is about 4.2 ohms.
The resistance of a vanity mirror lamp bulb is about 4.2 ohms.

Step	Action	Value(s)	Yes	No
1	Check the operation of the courtesy lamp. Does the courtesy lamp operate?	-	Go to Step 3	Go to Step 2
2	Repair the interior courtesy lamp system before completing this diagnostic table. Does the key illumination lamp function after the courtesy lamp system has been repaired?	-	System OK	Go to Step 3
3	Remove the sun visor. Check the voltage at terminal 1 of the wire harness connector for the vanity mirror. Does the voltmeter indicate the specified value?	11-14 v	Go to Step 5	Go to Step 4
4	Repair the open circuit between fuse EF11 and terminal 1 of the vanity mirror connector. Is the repair complete?	-	System OK	-
5	Connect an ohmmeter between ground and terminal 2 of the vanity mirror connector. Does the ohmmeter indicate the specified value?	~0Ω	Go to Step 7	Go to Step 6
6	Repair the open circuit between terminal 2 of the vanity mirror connector and ground. Is the repair complete?	-	System OK	-
7	Check the lamp bulbs. Are the lamp bulbs OK?	-	Go to Step 9	Go to Step 8
8	Replace any faulty lamp bulbs. Is the repair complete?	-	System OK	-
9	Replace the sun visor. Is the repair complete?	-	System OK	-

Door Step Lamps

Door Step Lamps Inoperative

Test Description

The number below refers to Step 1 on the diagnostic table.

Bulb test. Clip one end of a jumper wire to the negative battery terminal. Clip the other end of the jumper wire onto one end of the bulb. Take the end of the bulb without the jumper attached and touch it to the positive battery terminal.

Step	Action	Value(s)	Yes	No
1	Remove the door step lamp bulb and inspect the filament. If the filament is not broken, test the bulb using the vehicle’s battery and a jumper wire. Does the bulb pass the visual and physical check?	-	Go to Step 3	Go to Step 2
2	Replace the bulb. Is the repair complete?	-	System OK	-
3	Reinstall the door step lamp bulb. Check fuse EF11. Is fuse EF11 blown?	-	Go to Step 4	Go to Step 5
4	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
5	Check the voltage at fuse EF11. Does the voltage at fuse EF11 equal the specified value?	11-14 v	Go to Step 7	Go to Step 6
6	Repair the open circuit between the battery and fuse EF11. Is the repair complete?	-	System OK	-
7	Disconnect the doorstep lamp electrical connector. Check the voltage terminal 12 of connector C352 and terminal 13 of connector C361. Does the voltage equal the specified value?	11-14 v	Go to Step 8	Go to Step 9
8	Repair the open circuit between fuse EF11 and the door step lamp. Is the repair complete?	-	System OK	-
9	Reconnect the door step lamp. Remove the front door switch. With a voltmeter or test lamp, test the circuit wire, terminal 4, at the front door switch. Does the voltage at the front door switch equal the specified value?	11-14 v	Go to Step 11	Go to Step 10
10	Repair the open circuit between the door step lamp and the front door switch. Is the repair complete?	-	System OK	-
11	Use an ohmmeter to check the resistance between ground and the circuit wire at the front door switch connector on the harness side. Is the resistance equal to the specified value?	0Ω	Go to Step 12	Go to Step 13
12	Replace the front door switch. Is the repair complete?	-	System OK	-
13	Repair the ground circuit for the front door switch. Is the repair complete?	-	System OK	-

Glove Box Lamp

Glove Box Lamp Inoperative

Test Description

The number below refers to Step 1 on the diagnostic table.

Bulb test. Clip one end of a jumper wire to the negative battery terminal. Clip the other end of the jumper wire onto one end of the bulb. Take the end of the bulb without the jumper attached and touch it to the positive battery terminal.

Step	Action	Value(s)	Yes	No
1	Remove the glove box lamp bulb and inspect the filament. If the filament is not broken, test the bulb using the vehicle’s battery and a jumper wire. Does the bulb pass the visual and physical check?	-	Go to Step 3	Go to Step 2
2	Replace the bulb. Is the repair complete?	-	System OK	-
3	Reinstall the glove box lamp bulb. Check fuse F13. Is fuse F13 blown?	-	Go to Step 4	Go to Step 5
4	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
5	Check the voltage at fuse F13. Does the voltage at fuse F13 equal the specified value?	11-14 v	Go to Step 7	Go to Step 6
6	Repair the open circuit between the battery and fuse F8. Is the repair complete?	-	System OK	-
7	Disconnect the glove box lamp electrical connector. Check the voltage at terminal 1 of the glove box lamp. Does the voltage at terminal 1 of the glove box lamp equal the specified value?	11-14 v	Go to Step 8	Go to Step 9
8	Repair the open circuit between fuse F13 and the glove box lamp. Is the repair complete?	-	System OK	-
9	Connect the glove box lamp. Remove the glove box lamp switch. With a voltmeter or test lamp, test terminal 1 of the glove box lamp switch at the glove box switch. Does the voltage at terminal 1 of the glove box lamp switch equal the specified value?	11-14 v	Go to Step 11	Go to Step 10
10	Repair the open circuit between the glove box lamp and the glove box lamp switch. Is the repair complete?	-	System OK	-
11	Use an ohmmeter to check the resistance between ground and terminal 2 of the glove box lamp switch connector on the harness side. Is the resistance equal to the specified value?	0Ω	Go to Step 12	Go to Step 13
12	Replace the glove box lamp switch. Is the repair complete?	-	System OK	-
13	Repair the ground circuit for the glove box lamp switch. Is the repair complete?	-	System OK	-

Ashtray Lamp

Notice : When probing a bulb socket with a voltmeter or a test lamp, do not allow the probe to touch both the positive and the negative contacts at the same time, which will blow a fuse.

Step	Action	Value(s)	Yes	No
1	Check fuses EF21. Is either fuse EF21 blown?	-	Go to Step 2	Go to Step 3
2	Check for a short circuit to EF21 and repair if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
3	Turn the light switch on. Remove the ashtray lamp from the socket. Use a voltmeter to check battery voltage available at the ashtray lamp socket. Does the battery voltage match the value specified?	-	Go to Step 5	Go to Step 4
4	Repair the open circuit between the ashtray lamp socket and fuse EF21. Is the repair complete?	-	System OK	-
5	Turn the light switch on. Using an ohmmeter, check the ground circuit to the lamp socket. Does the resistance equal the value specified?	~0Ω	Go to Step 7	Go to Step 6
6	Repair the open ground circuit between the ashtray lamp socket and ground. Is the repair complete?	-	System OK	-
7	Replace the ashtray lamp. Is the repair complete?	-	System OK	-

Cigar Lighter

Cigar Lighter Inoperative

Step	Action	Value(s)	Yes	No
1	Check fuse F13. Is the fuse blown?	-	Go to Step 2	Go to Step 3
2	Check for a short circuit and repair it, if necessary. Replace the fuse. Is the repair complete?	-	System OK	-
3	Turn the ignition key to ACC. Use a voltmeter to check for voltage at fuse F13. Does the battery voltage available at the fuse F13 match the value specified?	11-14 v	Go to Step 5	Go to Step 4
4	Repair the open power supply circuit for fuse F13. Is the repair complete?	-	System OK	-
5	Remove the electrical connector from the back of the cigar lighter. Turn the ignition key to ACC. Use a voltmeter to check the voltage at terminal 2 of the cigar lighter. Does the battery voltage available at terminal 2 of the cigar lighter match the value specified?	11-14 v	Go to Step 7	Go to Step 6
6	Repair the open circuit between the fuse F13 and the cigar lighter. Is the repair complete?	-	System OK	-
7	With the ignition key still in the ACC position, use an ohmmeter to check continuity between terminal 1 of the cigar lighter connector and ground. Does the battery voltage match the value specified?	11-14 v	Go to Step 9	Go to Step 8
8	Repair the open ground circuit. Is the repair complete?	-	System OK	-
9	Replace the cigar lighter. Is the repair complete?	-	System OK	-