Hummer H2. Manual — part 554

2. Use a rubber mallet to ensure proper seating of the weatherstrip on the pinch-weld flange.

3. Close the door.

MIRROR REPLACEMENT

Removal Procedure

1. Remove the door trim panel. Refer to Trim Panel Replacement - Side Front Door .

2. Remove the water deflector. Refer to Water Deflector Replacement - Front Door .

Fig. 141: Front Door Mirror
Courtesy of GENERAL MOTORS CORP.

3. Disconnect the mirror electrical connector (2).

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

4. Remove the fasteners (1) retaining the mirror to the door.

5. Remove the mirror from the vehicle.

Installation Procedure

1. Place the mirror into position on door.

Fig. 142: Front Door Mirror
Courtesy of GENERAL MOTORS CORP.

2. Install the fasteners (1) retaining the mirror to the door.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

Tighten: Tighten the fasteners to 25 N.m (18 lb ft).

3. Connect the mirror electrical connector.

4. Install the water deflector. Refer to Water Deflector Replacement - Front Door .

5. Install the door trim panel. Refer to Trim Panel Replacement - Side Front Door .

DESCRIPTION AND OPERATION

POWER WINDOWS DESCRIPTION AND OPERATION

Power Window System Components

The power window system consists of the following components:

z

Driver Door Module (DDM)

z

Passenger Door Module (PDM)

z

Body Control Module (BCM)

z

RR power window switch

z

Window up and window down relays in each of the rear passenger window switches

z

Window lockout switch

z

Reversible power window motors in each of the doors (circuit breaker protected)

z

LT DOOR CB 25A (System power for left windows)

z

RT DOOR CB 25A (System power for right windows)

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 four 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
two front windows have three positions UP, Down and Express Down, while the switches for the rear windows
have only two 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 two positions Up and Down. Each of these switch positions is a direct input to
the PDM.

The two 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

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2

rear window motors.

Power Window Motor Operation

A permanent magnet motor operates each of the power side windows. Each motor raises or lowers the glass
when the motor receives voltage. The direction the motor turns depends on the polarity of the supply voltage.
The power window switches control the polarity of the supply voltage. A built-in circuit breaker protects each
motor. The circuit breaker opens when the switch is depressed for a extended period of time under the following
conditions:

z

The window has an obstruction.

z

The window is fully open or fully closed.

The circuit breaker will reset automatically as the circuit breaker cools.

Driver Power Window Operation

The switch for the driver power window has three positions UP, Down and Express Down and its position is a
direct input into the DDM. Upon receiving a request for power window operation (switch activation), the DDM
supplies voltage to the power window motor left front up or down circuit and grounds the opposite and the
power window motor runs to move the window up or down.

Front Passenger Power Window Operation

The switch for the front passenger power window has two positions UP and Down, and its position is a direct
input into the PDM. Upon receiving a request for power window operation (switch activation), the PDM
supplies voltage to the power window motor right front up or down circuit and grounds the opposite and the
power window motor runs to drive the window up or down.

The front passenger power window can also be controlled from the power window master switch. The power
window master switch for the front passenger power window has three positions UP, Down and Express Down
and its position is a direct input into the DDM. Upon receiving a request for front passenger power window
operation (switch activation), the DDM transmits a Class 2 message indicating the changed switch position.
When the PDM receives this message, the PDM supplies voltage to the power window motor right front up or
down circuit and grounds the opposite and the power window motor runs to move the window up or down.

Rear Passenger Power Window Operation

The passenger power window switches incorporate window up and down relays. The supply side of all the
window up and down relays receive voltage through the battery voltage supply circuit and the LT DOOR or RT
DOOR circuit breakers respectively. The normally closed contacts of each relay is connected to ground. The
load side of each of the relays are connected to either side of the power window motor through the power
window up and down circuits. The relay coil feed circuits are connected to the BCM through the power window
lockout control circuit and the relay control circuits are connected to the power window switches and to the
BCM.

If a rear power window switch is placed in the down position, the down relay would energize and allow battery

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Doors - Hummer H2