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Re: I have a 2002 Bravada and the sunroof does not work....
The motor for the sunroof is located in the roof typically under the head liner and trim. One additional thing you could do before ripping everything apart would be to check the voltage at the sunroof, before replacing the motor. If you have power than chances are you need a new motor. If you dont have power than you may have over looked a fuse or relay.
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Sunroof Description and Operation (One Connector System)
This diagnostic procedure is to be used for the 1 connector Sunroof System that combines the sunroof control module with the sunroof motor/actuator.
The Sunroof System consists of the following components:
• BATT MAIN 2 Fuse 50 A
• Body control module (BCM)
• RAP relay
• S/Roof Fuse 20 A
• Sunroof module (includes sunroof motor/actuator)
• Sunroof switch
The Sunroof System is controlled by the sunroof switch and the sunroof motor/actuator assembly.
When the ignition is turned to RUN or ACCESSORY, or when the retained accessory power (RAP) system is active, the body control module (BCM) applies a ground to the RAP relay in the instrument panel (I/P) fuse block. This activates the RAP relay and allows battery positive voltage to be applied through the SUNROOF Fuse to the sunroof module. Ground for the sunroof module is supplied from G302.
The sunroof can be placed in 3 preset positions:
When the sunroof switch is placed in the OPEN position, a ground is applied from the sunroof switch low reference circuit , through the sunroof switch and to the sunroof switch open signal circuit. The sunroof motor/actuator then applies voltage to the sunroof motor open control circuit and applies a ground to the sunroof motor close circuit. The sunroof motor then opens the sunroof to the full open position.
When the sunroof switch is placed in the VENT position, a ground is applied from the sunroof switch low reference circuit , through the sunroof switch and to the sunroof switch open signal circuit. The sunroof module then applies voltage to the sunroof motor open control circuit and applies a ground to the sunroof motor close circuit. The sunroof motor then opens the sunroof to the VENT position.
When the sunroof switch is placed and held in the CLOSED position, a ground is applied from the sunroof switch low reference circuit , through the sunroof switch and to the sunroof switch close signal circuit. The sunroof module then applies voltage to the sunroof motor close control circuit and applies a ground to the sunroof motor open circuit. The sunroof motor then closes the sunroof.
The sunroof can be placed in any preferred open position when:
• The sunroof is in the fully opened position by pressing and holding the sunroof switch in the CLOSE position until the panel has reached the desired position then release the CLOSE switch in order to stop the sunroof
• The sunroof is opening, it can be stopped by momentarily pressing either side of the switch.
The sunroof control module, sun roof actuator, and the sunroof motor are integral parts of the sunroof module assembly and are not service separately.
Your best bet , take it to a qualified repair shop or buick dealer .
check the 25 A breaker (PWR WDO) in fuse block I/P
if the driver power window is working your breaker is ok
check terminal B of the connector 2( pink wire) of the sunroof control module for 12 volts. check terminal D connector 2 of the sunroof control module(black wire) for a good ground. If the sunroof does not work with the switch you could jumper the power to the motor. You could try jumping terminal B to terminal A ( dark green wire) and jumping terminal D to terminal C (dark blue). If the sunroof goes the wrong way, change terminal B to terminal C and terminal D to terminal A. If it doesnot work the motor is dead.
No there is no fuse link to the power sunroof. you most likely have a bad motor or switch. Unplug the motor and hook a multimeter to it and operate the switch. If you are getting power to the switch then it's most likely the motor. you can check the motor by doing a continuity test, if the circuit is open when you test it then the motor has a short.
Sounds like sunroof is stuck, motor can't overcome load. Cheap test: car off, interior light turned on try to move sunroof, does light dim? If yes motor is trying to move but can't. If light does not dim then motor not getting power.
You will need to access the wiring to the sun roof and check for shorted/damaged wiring that might be rubbing on sheet metal and causing a short circuit, if you find nothing then the sun roof motor may be the culprit.