Just got my 1978 Chevy 1/2 ton step side truck back from the body shop a couple of weeks ago. I dismantled much of the truck for the paint and body work, dash out, bed off, grille out, interior out of truck, etc.
I finally got to putting the tail lights back on the truck. They don't work.

The brake lights work fine, but the tail lights refuse to work. I have tried everything I can think of. Can't find a fuse for the tail lights in the fuse box under the dash. The head lights work fine too. Is there a separate fuse for the tail lights or is it included in another circuit? I can't see how the brake lights can work but not the tail lights. I have checked all the wiring and it all appears to be in tact.
Please help. This is driving me nuts.
Any and all advise would be greatly appreciated. Thanks.