Power mirrors aren't serviceable. But you can check to see if the motor is getting power or not. If you disconnect the mirror harnessand ground pin 1 aply power to pin 4 for left and then apply poer to pin 1 and ground pin 4 that would tell you if it works and isnt' getting power to it. Then it could be a switch the wiring is different between power and non power windows.
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Sunday, January 29th, 2012 AT 6:23 PM