me and a guy traded transmissions and wiring harnesses . i pluged everythng in and my fuel pump wont come on , i talked to him and his fuel pump will not come on either . his car is a 94 camraro and my car is a 95 firebird . m y question is are these wiring harnesses interchageable ? if not what should i do to make the fuel pump work ? put it on its own switch .