Troubleshooting Hints - Exterior Lights

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS
1. Check LH MaxiFuse(R) Block BODY 1 Fuse by visual inspection.
2. Check Trunk Compartment Fuse Block LT PARK Fuse, RT PARK Fuse, and TURN Fuse by visual inspection.
3. Check Engine Compartment Fuse/Relay Center HAZARD Fuse, STOP Fuse, and CORNERING LAMP Fuse by visual inspection.
4. Check that grounds G101, G205, G400, G401 and G402 are clean and tight.
5. If one of the turn indicators goes on when the park lamps are turned on, check the front park/turn lamps on that side for open or poor connection.
6. If turn lamps stay on (do not flash) in both turn left and turn right positions, replace the Turn Flasher Module.
7. If hazard lamps stay on (do not flash) during the hazard operation, but stop lamps operate normally, replace the Hazard Flasher.
8. For any of the following symptoms, replace the turn/hazard switch assembly:
^ turn signal lamps will not turn on/off.
^ All turn/hazard/stop lamps 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.
9. If stop lamps do not turn off, adjust or replace the Stop/BTSI/Cruise Brake Switch.
10. If a turn indicator does not light but the turn signal works, check the bulb, connections and wiring to the indicator (see schematic).
11. If only one lamp does not operate, check the lamp, socket and related wiring for an open (see schematic).
12. If park lamps stay on and headlamps stay at full intensity with daylight conditions, check for an obstruction covering the twilight photocell (Refer to Headlamps).
13. Before component replacement, check that system connections are clean and tight.
^ 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.