I have a 1993 G20 conversion van. And most of the stuff past the two front seats seem to not have power, besides the lights you can turn on from the front. I don't know where to start to fix this issue, any help would be appreciated.

 

The first thing to always check are the fuses. After that you can check for damaged wires.

 

I've checked all the fuses in the fuse box in the back and none seemed bad, and I don't know if there'd be fuses in the front for the back. And how would I go about checking for wires? Trace them?