Tail lights and cluster light wont come on?

I just recently bought the car and it has an aftermarket shifter and radio installed so I guess I'll start there. If I remove the pins from the circuit the fuse still blows so I'm thinking it's not the cause. It's a pain to work on because I live in an apartment complex and we're not supposed to work on our cars here so I had to wrap it up early last night. I'm just glad I've got tail lights now, that was my major concern.