My fan quit working and I was checking it today. Without a load the plug harness has 10.9 v, but when I plug in the motor, it drops the voltage to 0. it's an 86 pu.
The motor spins when I hook it to a battery to directly.
I had the same prob with my 84 rc , my heater control has the 5 push tabs and a speed control switch. what i found was the push button went bad and the switch,would have voltage at it until it was put under load, i replaced the control and the switch and my fan works fine now.
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