Question about 1999 Chevrolet Astro
I was having problems with the switches like false contacts but yesterday I switched down the window and started smelling like burn and it did not work after that. i want to know what should I replace first or a tip to test it. thanks
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Posted on Jan 02, 2017
I believe there is a relay that needs to be reset after you replace the motor. Get a tester and make sure the wire is getting electricity to it too and that it's not just a fuse that's the problem. Hope it helps!
Posted on Jul 19, 2009
the drivers door switch is most likely bad, they get used the most and wear out first, the connector on the back of switch may have come loose and not making good electrical contact, remove switch and check connector and if still not working need new switch, the windows are all on same circuit and either all work or none work so not fuse. extremely rare is a short in wired but not likely.
Posted on Aug 18, 2009
I found the answer here; it tells you exactly which wires to jump in order to get the driver's side window to raise:
Posted on Nov 20, 2009
Testimonial: "thank you"
Tips for a great answer:
Passenger door module (PDM)
Body control module (BCM)
LR power window switch
RR power window switch
Window up and window down relays in each of the rear passenger window switches
Window lockout switch
Reversible power window motors in each of the doors (circuit breaker protected)
LT DOOR CB 25A (System power for left rear window)
RT DOOR CB 25A (System power for right rear window)
Power Window System Controls
The power window system will operate anytime the retained accessory power (RAP) system is active or when the ignition switch is in the ACCY or ON position.
The DDM contains 4 power window switches which are integral components. Closing any of the normally open, rocker type switches provides the DDM with a request for power window operation. The switches for the 2 front windows have 3 positions Up, Down and Express Down, while the switches for the rear windows have only 2 positions, Up and Down. Each of these switches and their positions is a direct input into the DDM. Upon receiving a request for power window operation, the DDM, transmits a class 2 message indicating the switch and it's changed position.
The PDM contains a single power window switch that is an integral component. Closing of this normally open, rocker switch provides the PDM with a request for the front passenger power window operation. The switch for the front passenger window has 2 positions Up and Down. Each of these switch positions is a direct input to the PDM.
The 2 rear passenger doors have there own switches. Each of the switches contain a power window up and down relay. A switch activation alone can control the up and down functions of the rear windows. However the BCM, upon receiving a class 2 message from the DDM, can control the set of relays which will activate the rear window motors.
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