Troubleshooting Hints - Exterior Lights

1. If only one lamp does not operate, check bulb, socket, and related wiring.
2. If vehicle is equipped with Daytime Running Lamps (DRL) and Exterior Lamps do not turn on automatically at dusk, see Daytime Running Lamps for diagnosis. Daytime Running Lamp
3. If the Turn Lamps and Backup Lamps do not work, check the TURN B/U Fuse.
4. If the Stop Lamps and Hazard Lamps do not work, check the STOP HAZ Fuse.
5. If the Stop Lamps do not turn work, check the Stop Lamp/TCC Switch and CKT 140 wire for continuity (see schematic).
6. If the Stop Lamps do not turn off, adjust or replace the Stop Lamp/TCC Switch as necessary.
7. If the Center High Mounted Stop Lamp (CHMSL) does not work, check bulb, CKT 820 wire and CKT 150 wire for an open.
8. For any of the following symptoms, replace the Turn Signal Switch:
^ Turn Signal Switch will not Turn
^ All Turn/Hazard/Stop Lamps do not work and C206 is firmly mated.
^ Some Turn Lamps work and all Hazard Lamps work.
^ Some Hazard Lamps work and all Turn Lamps work.
^ Hazard Lamps do not turn "OFF."
9. If the Turn Indicator and the Front Turn Signal Lamp on one side are inoperative, check the connection at connector C206 and CKT 14 for an open, then replace the Turn Signal Switch Assembly as necessary.
10. If Tail, Rear Side Marker, and License Lamps do not work, check the TAIL Fuse, Headlamp Switch, CKT 240, CKT 9, and CKT 150 wire for continuity.
11. If the Tail, Rear Side Marker, and License Lamps do not work, but the front Exterior Lamps work, check connector C204, CKT 9 and related wiring (see schematic).
12. If the Turn Lamps stay on (do not flash) in both "LEFT" and "RIGHT", replace the Turn Signal Lamp Flasher.
13. If the Hazard Lamps stay on (do not flash) in HAZARD, but the Stop Lamps go off normally, replace the Hazard Flasher.
14. If Park, Tail License, Rear Side Marker and Front Side Marker Lamps do not turn off, check Headlamp Switch. If "OK," check CKT 9 for a short to B+.
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a continuity/voltage check with a system disconnected .These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (see Troubleshooting Procedures). Diagnostic Aids