Section 18-01: Wiring and Circuit Protection
1996 F-150, F-250, F-350, F-Super Duty Chassis Cab, Motorhome Chassis, and Bronco Workshop Manual
DIAGNOSIS AND TESTING
Symptom Chart, Trailer Towing Package Wiring
TRAILER TOWING
Condition
Possible Source
Action
Trailer Lamps Inoperative
Fuse.
Rear lamp wiring.
Trailer feed wiring.
Trailer wiring or bulbs.
GO to
Pinpoint Test A
.
Trailer Stop, Turn or Hazard Lamps Inoperative
Fuse.
Rear lamp wiring.
Trailer feed wiring.
Trailer wiring or bulbs.
GO to
Pinpoint Test A
.
Trailer Tail Lamp and Running Lamps Inoperative
Fuse.
Rear lamp wiring.
Trailer feed wiring.
Trailer wiring or bulbs.
GO to
Pinpoint Test A
.
Trailer Battery Charging Inoperative
Fuse.
Rear lamp wiring.
Trailer feed wiring.
GO to
Pinpoint Test A
.
Trailer Electric Brakes Inoperative
Fuse.
Rear lamp wiring.
Trailer feed wiring.
Trailer wiring or bulbs.
GO to
Pinpoint Test A
.
Single Trailer Lamp Inoperative
Trailer wiring or bulbs.
Have trailer serviced by an authorized camper/trailer repair center.