Troubleshooting Hints - Exterior Lights

1. Check the TURN LPS, HAZARD LPS, PARK LPS, and STOP LPS Fuses by visual inspection.
2. If the Front Park Lamps are inoperative with the Headlamp Switch in PARK or HEAD, but operate with the Automatic Lamp Control ON, repair open in circuit 9 between the Underhood Wiring Harness Junction Block and the RH I/P Wiring Harness Junction Block.
3. If all Hazard and Turn Lamps are inoperative, check Hazard Switch for a sticking or binding condition. if OK, refer to ALL HAZARD LAMPS DO NOT OPERATE diagnostic table. Diagnosis By Symptom - Exterior Lights
4. If the Rear Marker Lamps are inoperative with Automatic Lamp Control ON, but operate with the Headlamp Switch in PARK or HEAD, repair open in circuit 9 between the Underhood Wiring Harness Junction Block and the RH I/P Wiring Harness Junction Block.
5. If only one bulb is inoperative, check bulb, connections, and related wiring for open.
6. Check Body Function Controller (BFC) for stored DTCs if Park Lamps do not light when dark.
7. if Turn Lamps flash at two times the normal rate, check for faulty connection or failed bulb.
8. If a Turn Indicator is inoperative, check bulb and related wiring. If OK, replace Instrument Cluster.
^ 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 Troubleshooting Procedures). Diagnostic Aids
^ Refer to Multifunction Switch in Steering Wheel and Column for Multifunction Switch Access. Service and Repair