I have pulled out the fan motor assy. It was so tired it would hardly turn at all. So I have a new fan. Here is the problem the wire harness that attaches to the fan motor pluges into the firewall behind the master cylinder. It has a black a red and a yellow wire at the plug. How do I check these wires for the correct voltages? On top of doing that someone has cut the red line and has jumped it straight from the fuse box with a key activated circut, thus not using the power sorce that comes thru the firewall plug. Why would this been done? I would like to nkow what the voltages sould be at the firewall and see if there are corect. Then re-hook up the original wires and harness before putting the new fan completely back in the car.
Thanks