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 

______________________________________________________

 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