Hummer H2. Manual - part 742

WIPER ARM TIP PRESSURE CHECK 

14

Test the rear window wiper switch signal circuit 
for an open or high resistance. Refer to Circuit 
Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 23

Go to Step 15

15

Inspect for poor connections at the harness 
connector of the rear wiper/washer switch. Refer 
to Testing for Intermittent Conditions and 
Poor Connections and Connector Repairs in 
Wiring Systems. 
Did you find and correct the condition?

Go to Step 23

Go to Step 21

16

Inspect for poor connections at the harness 
connector of the rear wiper module. Refer to 
Testing for Intermittent Conditions and Poor 
Connections and Connector Repairs in Wiring 
Systems. 
Did you find and correct the condition?

Go to Step 23

Go to Step 22

17

Repair an open or high resistance in the rear 
window wiper switch signal circuit. Refer to 
Circuit Testing and Wiring Repairs in Wiring 
Systems. 
Did you complete the repair?

Go to Step 23

-

18

Repair an open or a short to ground in the battery 
voltage circuit of the rear wiper module. Refer to 
Circuit Testing and Wiring Repairs in Wiring 
Systems. 
Did you complete the repair?

Go to Step 23

-

19

Repair an open or high resistance in the ground 
circuit of the rear wiper module. Refer to Circuit 
Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?

Go to Step 23

-

20

Repair a short to ground in the rear window 
wiper switch signal circuit. Refer to Circuit 
Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?

Go to Step 23

-

21

Replace the rear window wiper/washer switch. 
Refer to Wiper/Washer Switch Replacement - 
Rear . 
Did you complete the replacement?

Go to Step 23

-

22

Replace the rear wiper motor module. Refer to 
Wiper Motor Replacement - Rear . 
Did you complete the replacement?

Go to Step 23

-

23

Operate the system in order to verify the repair. 
Did you correct the condition?

System OK

Go to Step 3

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

Fig. 5: Measuring Required Wiper Arm Force 
Courtesy of GENERAL MOTORS CORP. 

1. Run the wiper arms to the mid-wipe position.  

2. Remove the wiper blades from the wiper arms. Refer to Wiper Arm Blade Replacement .  

3. Attach a scale to the end of the wiper arm and measure the force required to lift the wiper arm 

perpendicular to the windshield to normal working height with the blade attached.  

4. Replace the wiper arm if the measurement is not within the specification. Refer to Wiper Arm 

Replacement . 

Tip Pressure:  

z

Driver Side - 8.1-9.5 Newtons (29- 34 Ounces)  

z

Passenger Side - 5.8-7.0 Newtons (21- 25 Ounces) 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

WIPER BLADE ELEMENT CHECK 

Fig. 6: Inspecting Wiper Blade Element 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the wiper blades from the wiper arms. Refer to Wiper Arm Blade Replacement . 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

2. Look down the length of the blade element.  

3. Replace the wiper blade element if the rubber element which contacts the glass is not on the centerline of 

the blade +/-15 degrees. Refer to Wiper Blade Element Replacement .  

4. Install the wiper blades on the wiper arms. Refer to Wiper Arm Blade Replacement .  

REPAIR INSTRUCTIONS 

WASHER SOLVENT CONTAINER REPLACEMENT 

Removal Procedure 

1. Remove the washer solvent and place in a suitable container.  

2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls 6.0L 

(LQ4). 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2