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Wiring problem in drivers side door.

Tiny
ZCOLLINS
  • MEMBER
  • 1998 GMC C1500
  • 215,000 MILES
I just bought this truck off a guy and he had replaced the drivers side door. The passenger side window won't roll down using either the drivers side or the passenger side buttons. The drivers side window rolls down just fine. If I push the window button on the drivers side door for the passenger window it blows a fuse. The power lock buttons don't work either. I can lock the door if I push the up button on the drivers side door but cannot unlock it. What can I do to fix this.
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Monday, October 21st, 2013 AT 2:50 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Is this 2 door or 4 door? Usually the power windows work off a circuit breaker not a fuse. If the circuit breaker gets hot, it may trip, not work till it cools down.

I looked at wiring for two door, passenger side. The two wires you need to pay attention to are light blue wire and tan wire. Those are voltage and ground for the passenger side window. Because the motor is reversing motor, those two switch between voltage and ground depending if your going up or down.

Hinge side of driver side door, wiring harness, may have rubber boot protective covering, pull boot back far enough to access wires already mentioned. With the master switch activated for passenger side window, check those two wires for voltage or ground. The circuit may not go hot unless the key is on.

Could be issue with master switch-- passenger side window motor-- or wiring circuit, somewhere.
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Monday, October 21st, 2013 AT 6:01 PM

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