Hummer H2. Manual - part 738

 

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Hummer H2. Manual - part 738

 

 

z

Wiper Always On - Rear  

z

Wiper Inoperative - Rear  

LOW WASHER FLUID INDICATOR MALFUNCTION 

Low Washer Fluid Indicator Malfunction 

Step

Action

Yes

No

Schematic Reference: Wiper/Washer System Schematics 
Connector End View Reference: Wiper/Washer System Connector End Views 
DEFINITION: The low washer fluid indicator always indicates low washer fluid or does not turn on with 
low washer fluid.

1

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

Go to Step 2

Go to Symptoms - 

Wiper/Washer 

Systems

2

Verify the fault is present. 
Does the system operate normally?

Go to Testing for 

Intermittent Conditions 

and Poor Connections in 

Wiring Systems

Go to Step 3

3

1. Turn the ignition OFF.  

2. Disconnect the washer fluid level switch 

connector.  

3. Turn the ignition ON.  

Does the low washer fluid indicator illuminate 
for 60 seconds after the ignition is turned ON?

Go to Step 6

Go to Step 4

4

1. Turn the ignition OFF.  

2. Connect a fused jumper wire from the 

washer fluid level switch signal circuit 
terminal in the washer fluid level switch 
connector to a good ground.  

3. Turn the ignition ON.  

Does the low washer fluid indicator illuminate 
for 60 seconds after the ignition is turned ON?

Go to Step 5

Go to Step 7

5

1. Turn the ignition OFF.  

2. Connect a fused jumper wire across the 

washer fluid level switch harness 
connector terminals.  

3. Turn the ignition ON.  

Does the low washer fluid indicator illuminate 
for 60 seconds after the ignition is turned ON?

Go to Step 9

Go to Step 8

Test the washer fluid level switch signal circuit 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

WASHERS ALWAYS ON 

Washers Always On 

6

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

Go to Step 13

Go to Step 11

7

Test the washer fluid level 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 13

Go to Step 11

8

Repair the washer fluid level switch ground 
circuit for an open or high resistance. Refer to 
Circuit Testing and Wiring Repairs in Wiring 
Systems. 
Is the repair complete?

Go to Step 13

-

9

Inspect for poor connections at the washer fluid 
level 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 13

Go to Step 10

10

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

Go to Step 13

-

11

Inspect for poor connections at the instrument 
panel cluster. 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 13

Go to Step 12

12

Replace the instrument panel cluster. Refer to 
Instrument Panel Cluster (IPC) Replacement 
in Instrument Panel, Gauges, and Console.Is the 
repair complete?

IMPORTANT:

Perform the module setup procedure if 
required.

Go to Step 13

-

13

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 windshield washer pump is always ON.

1

Did you review the Wiper/Washer System Description 

Go to 

Go to Symptoms - 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

and Operation and perform the necessary inspections?

Step 2

Wiper/Washer Systems

2

1. Turn the windshield wiper/washer switch to the 

OFF position.  

2. Turn the ignition ON.  

Is the windshield washer pump always ON?

Go to 

Step 3

Go to Testing for 

Intermittent Conditions and 

Poor Connections in Wiring 

Systems

3

Are the windshield wipers always ON?

Go to 

Step 4

Go to Step 6

4

1. Disconnect the windshield wiper motor and module 

connector.  

2. Connect a test lamp from the windshield washer 

switch signal circuit terminal in the wiper motor 
harness connector to ground.  

3. Turn the ignition ON.  

Does the test lamp illuminate?

Go to 

Step 5

Go to Step 14

5

1. Disconnect the turn signal/malfunction switch 

connector.  

2. Test the windshield 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 17

Go to Step 12

6

Disconnect the washer fluid pump relay. 
Is the windshield washer pump ON?

Go to 

Step 8

Go to Step 7

7

Connect a test lamp from battery positive voltage to the 
washer fluid pump relay control circuit terminal in the 
underhood fuse block. 
Does the test lamp illuminate?

Go to 

Step 10

Go to Step 16

8

Disconnect the windshield wiper motor and module 
connector. 
Is the windshield washer pump always ON?

Go to 

Step 11

Go to Step 9

9

Test the washer fluid pump supply 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 17

Go to Step 14

10

1. Disconnect the windshield wiper motor and module 

connector.  

2. Test the washer fluid pump relay 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 17

Go to Step 14

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

WASHERS INOPERATIVE 

Washers Inoperative 

11

Repair the windshield washer pump control circuit for a 
short to voltage. Refer to Wiring Repairs in Wiring 
Systems. 
Is the repair complete?

Go to 

Step 17

-

12

Inspect for poor connections at the turn signal/malfunction 
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 17

Go to Step 13

13

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

Go to 

Step 17

-

14

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 17

Go to Step 15

15

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

Go to 

Step 17

-

16

Replace the windshield washer relay. 
Is the repair complete?

Go to 

Step 17

-

17

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

System 

OK

Go to Step 3

Step

Action

Values

Yes

No

Schematic Reference: Wiper/Washer System Schematics 
Connector End View Reference: Wiper/Washer System Connector End Views 
DEFINITION: The windshield washer is inoperative.

1

Did you review 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. Press the windshield washer switch.  

Do the windshield washers operate normally?

-

Go to Testing for 

Intermittent 

Conditions and Poor 

Connections in Wiring 

Systems

Go to Step 3

3

Do the windshield wipers operate when the 
windshield washer switch is pressed?

-

Go to Step 6

Go to Step 4

1. Disconnect the windshield wiper motor 

and module connector.  

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

  

 

 

 

 

 

 

 

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