Hummer H2. Manual - part 741

 

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Hummer H2. Manual - part 741

 

 

4

pump relay control circuit terminal to 
ground.  

3. Turn the ignition ON.  

4. Press the rear window washer switch.  

Does the test lamp illuminate when the switch is 
pressed?

Go to Step 6

Go to Step 5

5

1. Disconnect the windshield wiper motor 

and module connector.  

2. Connect a test lamp from the rear window 

washer switch signal circuit terminal to 
ground.  

3. Press the rear window washer switch.  

Does the test lamp illuminate when the switch is 
pressed?

Go to Step 10

Go to Step 7

6

Test the rear window washer pump control 
circuit for a short to ground. Refer to Circuit 
Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?

Go to Step 12

Go to Step 10

7

Test the rear window washer 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 12

Go to Step 8

8

Inspect for poor connections at the rear window 
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 12

Go to Step 9

9

Replace the rear window wiper/washer switch. 
Refer to Wiper/Washer Switch Replacement - 
Rear . 
Is the repair complete?

Go to Step 12

-

10

Inspect for poor connections at the windshield 
wiper motor and 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 12

Go to Step 11

11

Replace the windshield wiper motor and module. 
Refer to Wiper Motor Replacement . 
Is the repair complete?

Go to Step 12

-

12

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

  

WIPER ALWAYS ON - REAR 

Wiper Always On - Rear 

Step

Action

Yes

No

Schematic Reference: Wiper/Washer System Schematics 
Connector End View Reference: Wiper/Washer System Connector End Views

1

Did you review the Rear Wiper/Washer System 
Description and Operation and perform the necessary 
inspections?

Go to 

Step 2

Go to Symptoms - 

Wiper/Washer Systems

2

1. Turn the ignition ON.  

2. Turn the rear window wiper/washer switch to the 

OFF position.  

Is the rear window wiper always ON?

Go to 

Step 3

Go to Testing for Intermittent 

Conditions and Poor 

Connections in Wiring 

Systems

3

1. Disconnect the rear window wiper module 

connector.  

2. Connect a test lamp from the rear window wiper 

switch signal circuit terminal in the harness 
connector to ground.  

Does the test lamp illuminate?

Go to 

Step 5

Go to Step 4

4

Connect a test lamp from the rear window washer switch 
signal circuit terminal in the rear wiper motor harness 
connector to ground. 
Does the test lamp illuminate?

Go to 

Step 6

Go to Step 9

5

1. Disconnect the rear window wiper/washer switch 

connector.  

2. Test the rear window wiper switch signal circuit 

for a short to voltage. Refer to Circuit Testing 
and Wiring Repairs in Wiring Systems.  

Did you find and correct the condition?

Go to 

Step 11

Go to Step 7

6

1. Disconnect the rear window wiper/washer switch 

connector.  

2. Test the rear window washer switch signal circuit 

for a short to voltage. Refer to Circuit Testing 
and Wiring Repairs in Wiring Systems.  

Did you find and correct the condition?

Go to 

Step 11

Go to Step 7

7

Inspect for poor connections at the rear window 
wiper/washer switch. Refer to Testing for Intermittent 
Conditions and Poor Connections and Connector 
Repairs in Wiring Systems. 

Go to 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

WIPER INOPERATIVE - REAR 

Wiper Inoperative - Rear 

Did you find and correct the condition?

Step 11

Go to Step 8

8

Replace the rear window wiper/washer switch. Refer to 
Wiper/Washer Switch Replacement - Rear . 
Is the repair complete?

Go to 

Step 11

-

9

Inspect for poor connections at the rear window 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 11

Go to Step 10

10

Replace the rear window wiper module. Refer to Wiper 
Motor Replacement - Rear . 
Is the repair complete?

Go to 

Step 11

-

11

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

System 

OK

Go to Step 3

Step

Action

Yes

No

Schematic Reference:Wiper/Washer System Schematics 
Connector End View Reference:Wiper/Washer System Connector End Views 
DEFINITION: The rear wiper motor is inoperative in one or more modes, the rear washer pump may or 
may not operate.

1

Did you review the Rear Wiper/Washer System 
Description and Operation and perform the 
necessary inspections?

Go to Step 2

Go to Symptoms - 

Wiper/Washer 

Systems

2

1. Turn ON the ignition, with the engine OFF. 

2. Operate the rear wiper/washer system in all 

the switch positions.  

Does the rear wiper/washer system operate 
normally?

Go to Testing for 

Intermittent Conditions 

and Poor Connections 

in Wiring Systems

Go to Step 3

3

Inspect the courtesy lamps for proper operation. 
Refer to Interior Lighting Systems Description 
and Operation in Lighting System. 
Do the courtesy lamps operate properly?

Go to Step 4

Go to Symptoms - 

Lighting Systems in 

Lighting System

4

Does the rear wiper motor operate when the rear 
washer switch is pressed?

Go to Step 6

Go to Step 5

5

Is the rear wiper only inoperative when the rear 
washer switch is pressed?

Go to Step 11

Go to Step 6

1. Disconnect the harness connector of the 

rear wiper switch.  

2. Turn ON the ignition, with the engine OFF. 

3. Connect a test lamp from the accessory 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

6

voltage circuit of the rear wiper/washer 
switch to a good ground.  

Does the test lamp illuminate?

Go to Step 7

Go to Step 12

7

Connect a 15-ampere fused jumper wire from the 
accessory voltage circuit to the rear window 
wiper switch signal circuit. 
Does the rear wiper motor operate?

Go to Step 15

Go to Step 8

8

1. Turn OFF the ignition.  

2. Disconnect the harness connector of the 

rear window wiper module.  

3. Turn ON the ignition, with the engine OFF. 

4. Connect a test lamp from the rear window 

wiper switch signal circuit to a good 
ground.  

Does the test lamp illuminate?

Go to Step 9

Go to Step 17

9

Connect a test lamp from the rear window wiper 
switch signal circuit to the ground circuit of the 
rear wiper module. 
Does the test lamp illuminate?

Go to Step 10

Go to Step 19

10

Connect a test lamp from the battery voltage 
circuit of the rear wiper module to a good ground.
Does the test lamp illuminate?

Go to Step 16

Go to Step 18

11

1. Turn OFF the ignition.  

2. Disconnect the harness connector of the 

rear wiper/washer module.  

3. Turn ON the ignition, with the engine OFF. 

4. Connect a test lamp from the rear window 

wiper switch signal circuit to a good 
ground.  

5. Depress the rear washer switch.  

Does the test lamp illuminate?

Go to Step 16

Go to Step 14

12

Test the accessory voltage circuit of the rear 
wiper/washer switch for an open or a short to 
ground. Refer to Circuit Testing and Wiring 
Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 23

Go to Step 13

13

Test the rear window wiper switch signal circuit 
for a short to ground. Refer to Circuit Testing 
and Wiring Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 23

Go to Step 20

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

 

 

 

 

 

 

 

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