When I apply 12v directly to the passenger side power window motor plug, the power window motor works. With the plug still disconnected and I meter the vehicles plug, I get 12v when I press the up or down switch. When I plug the two connectors back together (the vehicles plug and the power window motors plug), there is no voltage and the motor does not go up or down. Even if I use the drivers side switch to make the passengers side go up or down. The drivers side window does not have any problems. Any help would be appreciated.
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