1998 F150 Brake Lights Wiring Diagram. If you install the fog lamp fuse in the bjb aka battery junction box engine compartment fuse panel fuse 9 15 a fuse and jumper the normally open contacts in the fog lamp relay socket see diagram below the fog. If your f150s brake light switch checked out ok and there are no brake lights illuminating at all inspect the wiring harness going from the brake switch to the bulbs themselves.
Wiring diagram turn signals and brake lights wiring diagram is a simplified standard pictorial representation of an electrical circuit. Subsequent diagrams is fairly simple but making use of it inside the range of how the system operates is a new different matter. Ford truck technical drawings and schematics section h wiring diagrams.
Changed fuses 78 and 18 as answered by a verified ford mechanic.
The white wire is the ground or negative wire connecting to the vehicle battery minus side. The white wire is the ground or negative wire connecting to the vehicle battery minus side. It shows the components of the circuit as simplified shapes and the skill and signal friends between the devices. It is primarily intended for ford trucks but most likely also applies to other ford models.