Dodge RAM TRUCK 1500 1995 Service Manual page 709

8W-60 POWER WINDOWS
8W - 60 - 1
POWER WINDOWS
POWER WINDOWS
The power window system is supplied power from
the 30 amp circuit breaker located behind the fuse
block. Power for the circuit breaker is supplied on
circuit A22 from the ignition switch. This circuit is
HOT when the ignition switch is in the RUN posi­
tion.
Power for the A22 circuit is supplied by the A2 cir­
cuit which is HOT at all times and protected by a 40
amp fuse located in the Power Distribution Center
(PDC), cavity 2.
Circuit F21 connects from the circuit breaker to
both window switches. Circuit F21 is the feed for the
switches. Both switches use a bus bar to provide
power for the different functions of the switch.
The ground path for the system is through the
master window switch on the Z3 circuit.
MASTER WINDOW SWITCH (LEFT WINDOW
OPERATION)
When the window switch is moved to the window
DOWN position, voltage is supplied on the F21 cir­
cuit through the closed contacts in the switch to the
Q21 circuit. The Q21 circuit connects from the switch
to the left front window motor. Grounding is provided
on circuit Qll from the motor back to the switch.
The ground is passed through the switch to ground
on the Z3 circuit.
When window UP operation is selected, the power
and ground circuits are reversed. Circuit Qll is the
feed and circuit Q21 is the ground.
M A S T E R WINDOW SWITCH (RIGHT WINDOW
OPERATION)
When the window switch is moved to the window
DOWN position, voltage is supplied on the F21 cir­
cuit through the closed contacts in the switch to the
Q26 circuit. The Q26 circuit connects from the mas­
ter switch to the right window switch. A bus bar in­
ternal to the right switch passes the voltage through
the switch to circuit Q22. Circuit Q22 connects from
the switch to the right window motor. Grounding is
provided on circuit Q12 from the motor back to the
right switch.
The ground is passed through the switch on a bus
bar to circuit Q16. Circuit Q16 then connects to the
master switch. The ground is passed through the
switch to ground on the Z3 circuit.
When window UP operation is selected, the power
and ground circuits are reversed. Circuits Q16 and
Q12 are the feeds and circuits Q22 and Q26 are the
grounds.
RIGHT WINDOW SWITCH OPERATION
When the window switch is moved to the window
DOWN position, voltage is supplied on the F21 cir­
cuit through the closed contacts in the switch to the
Q22 circuit. The Q22 circuit connects from the switch
to the right front window motor. Grounding is pro­
vided on circuit Q12 from the motor back to the
switch. The ground is passed through the switch to
the Q16 circuit. The Q16 circuit connects from the
right switch to the master switch. Ground is passed
through the master switch to ground on the Z3 cir­
cuit.
When window UP operation is selected, the power
and ground circuits are reversed. Circuit Q12 is the
feed and circuits Q22 and Q26 are the ground.
HELPFUL INFORMATION
• Check the 40 amp fuse located cavity 2 of the PDC
• Check the 30 amp circuit breaker located in the
fuse block
• Check the ground for the power window system
DIAGRAM INDEX
Component Page
Circuit Breaker 8W-60-2, 3
Fuse 2 (PDC) .8W-60-2, 3
Ignition Switch 8W-60-2, 3
Power Window Motor 8W-60-2, 3
Power Window Switch 8W-60-2, 3