Hummer H1 (2002+). Manual — part 218

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Electrical System 12-97

®

05745159

Drivers Window Inoperative

Step

Action

Value(s)

Yes

No

1

Do all the other windows operate as designed?

–––

Go to step 2.

Refer to proper

chart.

2

Remove the drivers power window switch and
harness from the bezel. With a DVOM check the
resistance to ground on cavities 2 (CKT 56) and 4
(CKT 56). Does the resistance on each wire meet
the specifications?

<.2

Ω

Go to step 3.

Repair the open

or bad connection

in CKT 56

between the

power window

switch and G4.

3

Turn the ignition switch to the ”Run” position and
check the voltage on terminal 3 (CKT 170). Is the
specified voltage present?

12v

Go to step 4.

Repair the open

or bad connection

on CKT 170

between the

power window

switch and relay

R4.

4

Connect the power window switch to the harness.
With the ignition in the “Run” position back probe
cavities 1 (CKT 227) and 5 (CKT 226) with a
DVOM set to measure voltage. Operate the window
switch and observe the voltage polarity. The voltage
should switch from +12v to -12v with the operation
of the switch. Does the polarity switch?

+12v to -12v

Go to step 5.

Replace the

drivers door

power window

switch.

5

Gain access to the window motor. Disconnect the
harness and with a DVOM check the wires for
polarity change when the power window switch is
operated. Does the polarity change?

+12v to -12v

Replace the

power window

motor.

Repair the open

or bad connection

on circuits 226

and 227 between

the power win-

dow switch and

the power win-

dow motor.

4-1-00

12-98

Electrical System

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®

Power Windows Only Operate Using The Console Switches

Step

Action

Value(s)

Yes

No

1

Does the drivers door window operate as
designed?

–––

Go to step 2.

Refer to the

proper chart.

2

If the window lock out switch is in the “Lock”
position move it to the “Unlock” position. Are the
power windows operating as designed?

–––

No further

repair is needed

at this time.

Go to step 3.

3

Gain access to the power window switches on the
console. With a DVOM check for a ground on
terminals 2 and 4 of all three power window
switches. Do all six wires meet with the specified
value for resistance to ground?

<.2

Ω

Go to step 4.

Repair the open

or bad connection

between the

power window

switches and

ground G4.

4

Turn the ignition switch to the “Run” position.
With a DVOM back probe the purple wire on the
power window lock out switch. Make sure the
switch is in the “Unlock” position. Is the specified
voltage present?

12v

Refer to the

individual

window charts.

Go to step 5.

5

With the ignition still in the “Run” position check
the voltage on the red wire (CKT 171) of the
power window lockout switch harness. Is the
specified voltage present?

12v

Replace the

power window

lock out switch.

Repair the open

or bad connection

between the

power lock out

switch and relay

R4.

4-1-00

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Electrical System 12-99

®

05745159

Passenger Front Door Power Window Inoperative

Step

Action

Value(s)

Yes

No

1

Do all the other windows operate as designed?

––-

Go to step 2.

Refer to the

proper chart.

2

Gain access to the passenger front power window
switch harness in the door. Turn the ignition
switch to the run position. With a DVOM check
the voltage at terminal 3 (CKT 170). Is the speci-
fied voltage present?

12v

Go to step 3.

Repair the open

or bad connection

in CKT 170
between the

power window

switch and the

power window

lock out switch.

3

Disconnect the power window switch from the
harness. Using a DVOM check for resistance to
ground on terminals 2 (CKT 314) and 4 (CKT
313). Does the resistance meet the specifications?

<.2

Ω

Go to step 4.

Repair the open

or bad connection

on CKT 313 or

314 between the

passenger door

window switch

and the console

window switch.

4

Connect the power window switch to the harness
and make sure that the ignition switch is in the run
position. With a DVOM back probe terminals 1
(CKT 227) and 5 (CKT 226) at the same time.
Check the voltage while operating the switch from
“Up” to “Down”. Is the specified voltage present
and does the polarity change from positive to nega-
tive with the action of the switch?

+12v to -12v

Go to step 5.

Replace the

passenger front

power window

switch.

5

Gain access to the power window motor and dis-
connect the harness. With a DVOM back probe
the red wire (CKT 227) and the yellow wire
(CKT 226). Operate the power window switch
and watch the voltage. Is the specified voltage
present and does it change from positive to nega-
tive with the action of the switch.

+12v to -12v.

Replace the pas-

senger front

window motor.

Repair the open

or bad connection

on either CKTS

226 or 227

between the

power window

motor and

switch.

4-1-00

12-100

Electrical System

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®

(Passenger/Drivers) Rear Door Power Window Inoperative

NOTE: Refer to the wiring diagram for the circuit numbers.

Step

Action

Values

Yes No

1

Do all the other windows operate as designed?

––-

Go to step 2.

Refer to the

proper chart.

2

Gain access to the rear power window switch har-
ness in the door. Turn the ignition switch to the
run position. With a DVOM check the voltage at
terminal 3 (CKT 170). Is the specified voltage
present?

12v

Go to step 3.

Repair the open

or bad connection

in CKT 170
between the

power window

switch and the

power window

lock out switch.

3

Disconnect the power window switch from the
harness. Using a DVOM check for resistance to
ground on terminals 2 and 4. Does the resistance
meet the specifications?

<.2

Ω

Go to step 4.

Repair the open

or bad connection

on the tan wire or

the light green

wire between the

door window

switch and the

console window

switch.

4

Connect the power window switch to the harness
and make sure that the ignition switch is in the run
position. With a DVOM back probe terminals 1 and
5 at the same time. Check the voltage while operat-
ing the switch from “Up” to “Down”. Is the speci-
fied voltage present and does the polarity change
from positive to negative with the action of the
switch?

+12v to -12v

Go to step 5.

Replace the

power window

switch.

5

Gain access to the power window motor and dis-
connect the harness. With a DVOM back probe
the red wire and the yellow wire, Operate the
power window switch and watch the voltage. Is
the specified voltage present and does it change
from positive to negative with the action of the
switch.

+12v to -12v.

Replace the

window motor.

Repair the open

or bad connection

in the wires

between the

power window

motor and

switch.

4-1-00