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Ok guys I have a 91 c4 and when the guy rebuilt the motor one of he's workers rewired my fans and cut the wires to the a/c. Here are some pics of what he did.
He cut the blue wire from the plug and added the white wire that goes to the blower motor. The red circle is where he cut blue wire.
This is where he spliced it the white wire into the purple wire
Do i just tie it all together so my a/c will work. I haven't tried unhooking the white wire to see if the fans stop.
I had a similar problem when I had a ZZ4 crate motor installed. Try to reach that "worker" to find out what he did B4 making yourself crazy tracing/tracking wires and connections. FWIW