Hummer H2. Manual — part 740

3

wiper switch high signal circuit terminal to ground.

3. Turn the ignition ON.

Do the windshield wipers operate at high speed?

Go to

Step 8

Go to Step 4

4

1. Disconnect the windshield wiper motor and module

connector.

2. Connect a test lamp from the accessory voltage

supply circuit terminal in the windshield wiper
motor harness connector to a good ground.

3. Turn the ignition ON.

Does the test lamp illuminate?

Go to

Step 5

Go to Step 6

5

Connect a test lamp from battery positive voltage to the
windshield wiper motor ground circuit terminal in the
windshield wiper motor harness connector.
Does the test lamp illuminate?

Go to

Step 10

Go to Step 7

6

Repair the accessory voltage supply circuit to the
windshield wiper motor and module for an open or short to
ground. Refer to Circuit Testing and Wiring Repairs in
Wiring Systems.
Is the repair complete?

Go to

Step 12

-

7

Repair the windshield wiper motor and module 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 12

-

8

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 12

Go to Step 9

9

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 12

-

10

Inspect for poor connections at the windshield wiper motor
and module. Refer to Testing for Intermittent
Conditions and Poor Connections and to 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

WIPERS INOPERATIVE - ONE OR MORE MODES

Test Description

The numbers below refer to the step numbers on the diagnostic table.

5: This step tests for continuity through the 390 ohm resistor in the windshield wiper/washer switch.

6: This step tests for continuity through the delay resistors in the windshield wiper/washer switch. The
measured resistance will change in sequence from low to high as the delay speed is increased.

Wipers Inoperative - One or More Modes

Step

Action

Values

Yes

No

Schematic Reference:Wiper/Washer System Schematics
Connector End View Reference:Wiper/Washer System Connector End Views
DEFINITION: Windshield wipers are inoperative in one or more 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 ON the ignition.

2. Attempt to operate the windshield

wipers in all modes.

Does the system operate normally?

-

Go to Testing for

Intermittent

Conditions and Poor

Connections in

Wiring Systems

Go to Step 3

3

Do the windshield wipers operate in the high
speed mode?

-

Go to Step 5

Go to Step 4

4

1. Disconnect the turn signal/multifunction

switch connectors.

2. Connect a fused jumper wire from the

windshield wiper switch high signal
circuit terminal in the body harness
connector half to a good ground.

3. Turn ON the ignition.

Do the windshield wipers operate at high
speed?

-

Go to Step 8

Go to Step 7

5

1. Disconnect the turn signal/multifunction

switch connectors.

2. Test the resistance from the windshield

wiper switch voltage supply circuit
terminal to the windshield wiper switch
signal circuit terminal in the turn
signal/multifunction switch.

3. Operate the windshield wiper/washer

390

ohm

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

switch in the following positions:

z

MIST

z

LO

Is the resistance near the specified value in the
listed switch positions?

Go to Step 6

Go to Step 11

6

1. Test the resistance from the windshield

wiper switch voltage supply circuit
terminal to the windshield wiper switch
signal circuit terminal in the turn
signal/multifunction switch.

2. Operate the windshield wiper/washer

switch in all of the delay positions.

Does the resistance remain within the specified
values from low to high as the delay speed is
increased?

1K

ohm-

10K

ohm

Go to Step 9

Go to Step 11

7

1. Disconnect the windshield wiper motor

and module connector.

2. Test the windshield wiper switch high

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 16

Go to Step 14

8

Test the windshield wiper switch ground
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 16

Go to Step 12

9

Test the windshield wiper switch voltage
supply 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 16

Go to Step 10

10

Test the windshield wiper 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 16

Go to Step 14

11

Test the windshield wiper switch voltage
supply and signal circuits in the steering
column harness for an open or short to ground.
Refer to Circuit Testing and Wiring Repairs

-

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2

WASHER INOPERATIVE - REAR

Washer Inoperative - Rear

in Wiring Systems.
Did you find and correct the condition?

Go to Step 16

Go to Step 12

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 16

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 16

-

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 16

Go to Step 15

15

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

-

Go to Step 16

-

16

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 window washer is inoperative and the windshield washers operate normally.

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. Press the rear window washer switch.

Does the rear window washer operate normally?

Go to Testing for

Intermittent Conditions

and Poor Connections in

Wiring Systems

Go to Step 3

3

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

Go to Step 4

Go to Step 8

1. Disconnect the washer fluid pump relay.

2. Connect a test lamp from the washer fluid

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Wipers/Washer Systems - Hummer H2