I have a wiring harness from an 82 camaro and need to make it work with a wiper motor from an 85 camaro. I have the 82 wiper motor, but it will not bolt up to the firewall. I know that the 82 switch switches on the negative and the 85 switches on the positive. I ran power to where the ground used to be on the switch, which sets the switch up for the 85 style motor. now I need to know which wires go where on the wiper motor. I have the pigtails for the wiper motor. help me please??