Hummer H2. Manual - part 1375

Fig. 111: Removing Or Installing Relay In Electrical Center 
Courtesy of GENERAL MOTORS CORP. 

1. Install the relay (2) in the same position as removed. 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wiring Systems - Hummer H2

  

2. Install the electrical center cover.  

RELAY REPLACEMENT (ATTACHED TO WIRE HARNESS) 

Removal Procedure 

Fig. 112: Relay & Wire Harness Connector 
Courtesy of GENERAL MOTORS CORP. 

1. Locate the relay. Refer to the Master Electrical Component List to locate the relay in the vehicle.  

2. Remove any fasteners which hold the relay in place.  

3. Remove any connector position assurance (CPA) devices or secondary locks. 

IMPORTANT: Use care when removing a relay in a wiring harness when the relay is 

secured by fasteners or tape.

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wiring Systems - Hummer H2

  

4. Separate the relay (1) from the wire harness connector (2).  

Installation Procedure 

Fig. 113: Relay & Wire Harness Connector 
Courtesy of GENERAL MOTORS CORP. 

1. Connect the relay (1) to the wire harness connector (2).  

2. Install any connector position assurance (CPA) devices or secondary locks.  

3. Install the relay using any fasteners or tape that originally held the relay in place.  

UNDERHOOD ELECTRICAL CENTER OR JUNCTION BLOCK REPLACEMENT 

Removal Procedure 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wiring Systems - Hummer H2

  

1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure 

(Single Battery) in Engine Electrical. 

Fig. 114: Left Fender Upper Brace 
Courtesy of GENERAL MOTORS CORP. 

2. Remove the left fender upper brace. 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wiring Systems - Hummer H2