My 944 has a seemingly bad wiring problem. someone wired a switch to where the fuel relay goes, so I bought a new one. I took the wires out and put the new relay in, and it don't start. So I put the wires back. I need to know if it may be my fuse box or what? My wipers and turn signals don't work either!

 

Hard to tell what has been done when modifications to wiring are made. What year is your car?