86 F150 Tail light issue

my tail lights suddenly stopped working. I replaced the headlight switch and replaced ALL the fuses and they still wont work. Had a problem before but when i replaced the headlight switch it corrected the problem. Now i'm lost. I dont know what the issue could be. Front end headlights and running lights work but NOTHING is working on the rear of the truck.

There should be a disconnect plug at the left rear corner under the bed somewhere...your problem is prolly' right there.
Phil

my tail lights suddenly stopped working. I replaced the headlight switch and replaced ALL the fuses and they still wont work. Had a problem before but when i replaced the headlight switch it corrected the problem. Now i'm lost. I dont know what the issue could be. Front end headlights and running lights work but NOTHING is working on the rear of the truck.



check the ground wire from from the harness to the frame