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Hummer H3. Manual - part 1640
DESCRIPTION AND OPERATION
SUNROOF DESCRIPTION AND OPERATION
The power sunroof is controlled by the sunroof switch through the open and close motor control
circuits. Ignition voltage is supplied to the sunroof switch through the retained accessory power
(RAP) relay and the sunroof 20A fuse in the underhood BEC. While the sunroof switch is in an
inactive state both switch contacts are closed to the sunroof switch ground circuit. When an open
or close button is pressed on the sunroof switch, its switch contact is closed to the voltage supply
circuit. The motor is bi-directional and the direction of motor rotation is determined by which of
the motor control circuits is switched to positive voltage while the other remains grounded.
1
2. Open the sunroof window.
3. Screws are located on the inside edge of each corner of the window.
Tighten: 4 N.m (35 lb in)
2
Window, Sunroof
Tip: Remove the window from the outside the vehicle.
2007 Hummer H3
2007 ACCESSORIES & EQUIPMENT Sunroof - H3