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