Hummer H1 Service Manual page 873

12-100 Electrical System
(Passenger/Drivers) Rear Door Power Window Inoperative
NOTE: Refer to the wiring diagram for the circuit numbers.
Step
1 Do all the other windows operate as designed?
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?
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?
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?
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.
4-1-00
______________________________________________________
Action Values Yes
––- Go to step 2.
12v Go to step 3.
<.2 Ω
Go to step 4.
+12v to -12v Go to step 5.
+12v to -12v. Replace the
window motor.
®
No
Refer to the
proper chart.
Repair the open
or bad connection
in CKT 170
between the
power window
switch and the
power window
lock out switch.
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.
Replace the
power window
switch.
Repair the open
or bad connection
in the wires
between the
power window
motor and
switch.