Component Tests: Notes

It is necessary that the window be free to slide up and down for the power window system to function properly. If the window is not free to move up and down, the motor will overload and trip the circuit breaker. To determine if the glass is free, disconnect regulator plate from the glass and slide window up and down by hand.

An alternate method is to shake the glass in the door, with the glass positioned between the up and down stop positions. Check that the glass can be moved slightly from side to side, front and rear, and up and down. Then check that window is not bound tight in tracks. If window is not free, check window regulator and guides for binding or damage. Repair as necessary.