Troubleshooting Hints - Exterior Lights

1. Rear Lamp systems (Taillamps, Clearance Lamps, Endgate Lamps and License Plate Lamps) all receive Voltage from the same wire Circuit BRN (9) and share the same ground Terminal G401. If only one system is not working, LOCATE and REPAIR open in wiring and/or bulbs that pertain to that system.
2. CHECK condition of STOP/HAZARD, PARK LP. TURN-B/U and MAXI Fuse 2 (Pickup only) Fuse(s). If Fuse(s) is open, LOCATE and REPAIR source of overload. REPLACE fuse(s).
- 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 "Troubleshooting Procedures"). Diagnostic Aids