Hummer H2. Manual — part 735

1. Open the hood.

2. Disconnect the electrical connector (3).

3. Remove the bolt (1) from the horn bracket.

4. Remove the horn from the vehicle.

Installation Procedure

Fig. 5: Horn
Courtesy of GENERAL MOTORS CORP.

1. Position the horn to the vehicle.

2. Install the bolt (1) to the horn bracket.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Horns - Hummer H2

Tighten: Tighten the bolt to 9 N.m (80 lb in).

3. Connect the electrical connector (3).

4. Close the hood.

DESCRIPTION AND OPERATION

HORNS SYSTEM DESCRIPTION AND OPERATION

System Description

The horn system consists of the following components:

z

Horn fuse

z

Horn relay

z

Horn switch

z

Horn(s)

z

Body Control Module (BCM)

System Operation

The vehicle horns are activated under the following conditions:

z

The horn switch is depressed.

z

The body control module (BCM) commands the horns on. The BCM commands the horns on under either
of the following conditions:

{

When the content theft deterrent system detects a vehicle intrusion. For further information, refer to
Content Theft Deterrent (CTD) Description and Operation in Theft Deterrent.

{

When the panic button is depressed on the remote control door lock transmitter. For further
information, refer to Keyless Entry System Description and Operation in Keyless Entry.

{

When the OnStar(R) system is used to sound the horns, if equipped. For further information, refer
to OnStar Description and Operation in Cellular Communications.

{

When the keyless entry system is used to lock the vehicle, a horn chirp may sound to notify the
driver that the vehicle has been locked. The notification feature may be enabled or disabled through
personalization. For further information, refer to Keyless Entry System Description and
Operation in Keyless Entry.

Circuit Operation

Battery positive voltage is applied at all times to the horn relay coil and the horn relay switch. Pressing the horn
switch applies ground to the horn relay control circuit. The body control module BCM may also apply ground
to the horn relay control circuit as described above. When the horn relay control circuit is grounded, the horn
relay is energized and battery positive voltage is applied to the horn(s) through the horn control circuit. The
horn(s) sound as long as ground is applied to the horn relay control circuit.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Horns - Hummer H2

2004 ACCESSORIES & EQUIPMENT

Wipers/Washer Systems - Hummer H2

SPECIFICATIONS

FASTENER TIGHTENING SPECIFICATIONS

Fastener Tightening Specifications

SCHEMATIC AND ROUTING DIAGRAMS

WIPER/WASHER SYSTEM SCHEMATICS

Application

Specification

Metric

English

Front End Inner Side Panel Gussets

25 N.m

18 lb ft

Front Wiper Motor Bolts

12 N.m

9 lb ft

Rear Wiper Arm Nut

17 N.m

12.5 lb ft

Rear Wiper Motor Bolts

9 N.m

7 lb ft

Washer Solvent Reservoir Nuts

9 N.m

7 lb ft

Wiper Motor Transmission Bolts

9 N.m

7 lb ft

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

Fig. 1: Front Wiper/Washer Power, Ground, and Motors
Courtesy of GENERAL MOTORS CORP.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2