Not sure if this should be here on in the electronics section, but here it goes. I have a stock dual fan setup from a 91 GTA. I do not have the original harness for them. I plan to run both off of seperate switch/relays. On the fans where the GM electrical connections would plug into are, there are 2 pins. Which one is the ground and which is the positive pin?

Thanks

 

I think you can just pick one for the + and one for the -. If the fan runs backward, switch them.