There are only 2 wires for the fan. You can pretty easily find out which one is positive by jsut connecting them and see if the fan is turning in the correct direction. If its opposite its wires backwards.
You will definatly notice a difference when the Fluidyne is installed. Use that along with Water Wetter (you can get that at Pep Boys) and a low temp thermostat (Mugen makes a nice one) and your cooling system will be excellent. I never see the engine up to temperature unless i am stopped in traffic even in 90 degree heat.
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