Troubleshooting Hints - Exterior Lights

1. If the Turn Lamps do not work, check Fuse 30.
2. If the Hazard Lamps do not work, check Fuse 5.
3. If one of the Turn Indicators goes on when the Park Lamps are turned "ON," check the Front Park/Turn Lamp on that side for open or poor connection.
4. If Turn Lamps stay on (do not flash) in both Turn Left and Turn Right, replace the Turn/Hazard Flasher Module.
5. For any of the following symptoms replace the Turn Signal Switch:
^ Turn Signal Switch will not turn "ON"/"OFF."
^ All Turn/Hazard/Stoplamps do not work and C202 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."
6. If Hazard Lights stay on (do not flash) with Hazard Switch "ON," but Stop Lights operate normally, replace the Turn/Hazard Flasher Module.
7. If Stop Lights do not turn ""OFF," adjust/replace the Stoplamp Switch.
8. If a Turn Indicator does not light but the Turn Signal works, check the bulb, connection and wiring to the Indicator.
9. If only one light does not operate, check the Lamp, Socket and related wiring for opens or corrosion (see schematic).
10. If one Front Park and/or Marker Light does not light, check that its ground is clean and tight.
11. If none of the Park/Tail Lights work, check TAIL Fuse.
12. If Park Lights do not turn "OFF," check Headlamp Switch. If OK, repair CKT 9 for a short to B+.
13. If one rear lamp is inoperative, check for open in CKT 350 between S402 or S403 and lamp socket. Check for open in CKT 9 between S400 and inoperative lamp.
^ 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 (refer to General Troubleshooting Procedures). Diagnostic Aids
^ Refer to System Diagnosis. System Diagnosis - Exterior Lights