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