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check fuses , check for power at switch, check power at motor in door , power window switches are in console then power feed goes through door jam to inside of door to motor , check for corroded connections or breaks in the wiring if all wiring is good then process of elimination, for fuses, relay switch then motor, each item can be bought at GM or Year One Inc. that's how I did mine

Year One 1-800-950-9503

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12y ago
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Q: 1977 trans AM power windows not working?
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