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