I have a 1971 Alaskan pop up camper not over cab. I just purchesed it and non of the lights or anything work were would I locate the fuse box or junction box. It's on a 76 Cheyenne 1ton with a 454. Would the fuse box be in the truck or camper and were I've searched everywhere. Thanks.

Finding information on something that old is difficult but what you would have to do is look for a kick panel or false wall panel being held on by some wood screws. For the unit you have, most likely along the floor. Most I have seen with more modern campers would be near a sink, fridge or bed. If yours has a take that turns into a bed, try checking for a panel under the cushions or along the footboards under that area. Use a good LED flashlight for best visibility. A hint about access panels, if the screw head is an unusual style or square button look, most likely it wasn't meant to be accessible where screws with the typical #2 Phillips or cross-tip are there for general access at any time. Alaskan Campers

This link may also get you in contact with a manufacturer rep to give you specific details for your unit.