Hummer H2. Manual - part 739

 

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Hummer H2. Manual - part 739

 

 

4

2. Test the resistance from the windshield 

wiper switch supply voltage circuit 
terminal to the windshield wiper switch 
signal circuit terminal in the 
windshield wiper motor harness 
connector.  

3. Press the windshield washer switch.  

Is the resistance near the specified value?

0.5 

ohm

Go to Step 15

Go to Step 5

5

Test the following circuits for high 
resistance: 

z

Windshield wiper switch supply 
voltage circuit  

z

Windshield wiper switch signal circuit  

 
Refer to Circuit Testing and to Wiring 
Repairs in Wiring Systems. 
Did you find and correct the condition?

-

Go to Step 20

Go to Step 13

6

1. Disconnect the washer fluid pump 

relay.  

2. Connect a test lamp from battery 

positive voltage to the washer fluid 
pump relay control circuit terminal in 
the underhood fuse block.  

3. Turn the ignition ON.  

4. Press the windshield washer switch.  

Does the test lamp illuminate?

-

Go to Step 7

Go to Step 8

7

1. Connect the washer fluid pump relay.  

2. Disconnect the washer pump 

connector.  

3. Connect a test lamp across the washer 

pump harness connector terminals.  

4. Turn the ignition ON.  

5. Press the windshield washer switch.  

Does the test lamp illuminate?

-

Go to Step 18

Go to Step 9

8

Test the washer fluid pump relay control 
circuit for an open or high resistance. Refer 
to Circuit Testing and Wiring Repairs in 
Wiring Systems. 

-

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

Did you find and correct the condition?

Go to Step 20

Go to Step 15

9

1. Disconnect the windshield wiper motor 

and module connector.  

2. Connect a fused jumper wire from the 

washer fluid pump relay control circuit 
terminal in the wiper motor harness 
connector to a good ground.  

3. Connect a test lamp from the washer 

fluid pump supply voltage circuit 
terminal in the wiper motor harness 
connector to a good ground.  

4. Turn the ignition ON.  

Does the test lamp illuminate?

-

Go to Step 11

Go to Step 10

10

Test the washer fluid pump supply voltage 
circuit for an open or short to ground. Refer 
to Circuit Testing and Wiring Repairs in 
Wiring Systems. 
Did you find and correct the condition?

-

Go to Step 20

Go to Step 17

11

Test the windshield washer pump control 
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 20

Go to Step 12

12

Test the rear window washer pump control 
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 20

Go to Step 15

13

Inspect for poor connections at the turn 
signal/multifunction 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 20

Go to Step 14

14

Replace the turn signal/multifunction switch.
Refer to Multifunction, Turn Signal Switch 
Replacement in Steering Wheel and 
Column. 
Is the repair complete?

-

Go to Step 20

-

15

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. 

-

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

WIPERS ALWAYS ON 

Wipers Always On 

Did you find and correct the condition?

Go to Step 20

Go to Step 16

16

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

-

Go to Step 20

-

17

Replace the washer fluid pump relay. 
Is the repair complete?

-

Go to Step 20

-

18

Inspect for poor connections at the washer 
fluid pump. 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 20

Go to Step 19

19

Replace the washer fluid pump. Refer to 
Washer Pump Replacement . 
Is the repair complete?

-

Go to Step 20

-

20

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: Windshield wipers are always ON.

1

Did you perform the 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 windshield wiper/washer switch OFF.  

2. Turn the ignition ON.  

Are the windshield wipers always ON?

Go to 

Step 3

Go to Testing for 

Intermittent Conditions and 

Poor Connections in Wiring 

Systems

3

1. Disconnect the turn signal/multifunction switch 

connectors.  

2. Turn the ignition ON.  

Are the windshield wipers always ON?

Go to 

Step 4

Go to Step 6

4

1. Turn the ignition OFF.  

2. Disconnect the windshield wiper motor and module 

connector.  

3. Test the windshield wiper switch high signal circuit 

for a short to ground. Refer to Circuit Testing and 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

WIPERS INOPERATIVE - ALL MODES 

Wipers Inoperative - All Modes 

Wiring Repairs in Wiring Systems.  

Did you find and correct the condition?

Go to 

Step 10

Go to Step 5

5

Test the windshield 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 10

Go to Step 8

6

Inspect for poor connections at the windshield 
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 10

Go to Step 7

7

Replace the windshield wiper/washer switch. Refer to 
Multifunction, Turn Signal Switch Replacement in 
Steering Wheel and Column. 
Is the repair complete?

Go to 

Step 10

-

8

Inspect for poor connections at the windshield wiper 
motor. 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 10

Go to Step 9

9

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

Go to 

Step 10

-

10

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: Windshield wipers are inoperative in all modes.

1

Did you perform the 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. Attempt to operate the windshield wipers in all 

modes.  

Are the windshield wipers inoperative in all modes?

Go to 

Step 3

Go to Testing for 

Intermittent Conditions and 

Poor Connections in Wiring 

Systems

1. Disconnect the turn signal/multifunction switch 

connectors.  

2. Connect a fused jumper wire from the windshield 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

 

 

 

 

 

 

 

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