Stock trailer lighting hookup was not working on 1998 F150 Supercab Flareside. Replaced a fuse and got taillights to work but stoplights & turn signals still don't work. Is there another fuse? Does anyone have a wiring diagram? Other suggestions?

 

I ran into the same problem last weekend. Turns out there are a total of 3 fuse boxes in the engine compartment. The biggest one is the main box. Behind that box is another fuse box with factory tape over it. To the right of that one, closest to the driver's side fender, there is a real small one with factory tape. The small one has mini fuses in it. The 20 amp fuse controls the trailer flashers and stop lights. When I pulled the fuse out, it was blown. Replaced it and that fixed the problem. Good luck.

 

You da boss. I found the fuse box and the blown fuse. I even stopped by the local Ford dealer and they only pointed out the one fuse in the big box. Thanks again.