Quote:
Originally Posted by Sabaka454
Unplug the motor and install a volt meter in its place. Measure the voltage when holding up and then down. Is this a reproduction harness or a relay harness?
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It’s a custom harness which has been the root of all my issues thus far. I figured it out. The wiring from the express module (25614182) had two of the wires swapped, so it was having issues switching the polarity like it should. Out of frustration I rewired the driver door entirely from scratch and that turned out to be the issue. Thank you for all the replies. In the future if anyone is doing this express down upgrade and the motor only works correctly in one direction, chances are it’s in the wiring between the module and the switch.
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