Hummer H1 Service Manual page 902

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AUTO-DIMMING REAR VIEW MIRROR WITH
ELECTRONIC COMPASS AND TEMPERATURE
(OPTION)
Description
The Auto-Dimming rear view mirror has the capability to
change the opacity of the mirror glass to prevent glare. When a
following vehicles head lamps hit the rear light detection sen-
sor, the mirror's opacity will lessen. The now translucent mir-
ror will allow light to pass through it. This effectively lessens
the glare on the driver, much like moving the angle on a man-
ual mirror.
Removal
1. Disconnect mirror jumper harness from the rear of the
mirror assembly (See Figure 2-126).
2. Gently push upward on the mirror head and the compass
pod together until the mirror assembly is free of the
windshield button.
AMBIENT
LIGHT SENSOR
Figure 2-126: Auto-Dimming Mirror Jumper
Harness Connection
05745159
MIRROR JUMPER
HARNESS
COMPASS
POD
9-OM2-035.2
Electrical System
Installation
1. Grasp the mirror head with both hands
2. Slide the mirror down onto the window mount and gently
rock side to side until mirror base is seated. Do not force
the mirror onto the mount.
3. Connect the mirror jumper harness to the rear of the newly
installed mirror.
4. Set calibration and zone adjustments. (Refer to Auto-
Dimming compass
adjustment).
AUTO-DIMMING COMPASS MIRROR CALI-
BRATION AND ZONE ADJUSTMENTS
Calibration Adjustment
1. Start the engine.
2. Press and hold the auto-dimming power button until
"CAL" appears in the display and release (Figure 2-127).
3. Drive slowly in a circle away from large metal buildings
and power lines until the "CAL" disappears.
Zone Adjustment
1. Press and hold the mode button until "ZONE" appears in
the display (See Figure 2-127).
2. Each depression of the mode button will change the zone
number in sequence. Refer to the zone chart below for the
zone number of your area of operation (Figure 2-128).
3. When the desired zone is reached, allow the mirror to go
to normal mode then turn off the ignition.
AUTO-DIMMING
POWER BUTTON
AUTO-DIMMING
POWER L.E.D
COMPASS
POD
Figure 2-127: Auto-Dimming Rear View Mirror
12-129
mirror calibration and
MODE
BUTTON
REAR LIGHT
DETECTION
9-OM2-033.2
SENSOR
4-1-00
zone