Jeep XJ. Manual — part 147
moved in the opposite direction, the battery feed and
ground path to the motor(s) are reversed through the
switch contacts. This causes the motor to run in the
opposite direction.
Each motor contains a self-resetting circuit breaker
to protect it from overload. Consecutive or frequent
resetting of the circuit breakers must not be allowed
to continue, or the motors may be damaged. Make
the necessary repairs.
The power seat adjuster and motors cannot be
repaired, and are serviced only as a complete unit. If
any component in this unit is faulty or damaged, the
entire power seat adjuster and motors assembly must
be replaced.
CIRCUIT BREAKER
An automatic resetting circuit breaker in the junc-
tion block is used to protect the power seat system
circuit. The circuit breaker can protect the system
from a short circuit, or from an overload condition
caused by an obstructed or stuck seat adjuster.
The circuit breaker cannot be repaired and, if
faulty or damaged, it must be replaced.
DIAGNOSIS AND TESTING
POWER SEAT SYSTEM
Before any testing of the power seat system is
attempted, the battery should be fully-charged and
all wire harness connections and pins cleaned and
tightened to ensure proper continuity and grounds.
For circuit descriptions and diagrams, refer to 8W-63
- Power Seat in Group 8W - Wiring Diagrams.
With the dome lamp on, apply the power seat
switch in the direction of the failure. If the dome
lamp dims, the seat may be jamming. Check under
and behind the seat for binding or obstructions. If
the dome lamp does not dim, proceed with testing of
the individual components and circuits.
CIRCUIT BREAKER
For circuit descriptions and diagrams, refer to
8W-63 - Power Seat in Group 8W - Wiring Diagrams.
(1) Locate the correct circuit breaker in the junc-
tion block. Pull out the circuit breaker slightly, but
be certain that the circuit breaker terminals still con-
tact the terminals in the junction block cavities.
(2) Connect the negative lead of a 12-volt DC volt-
meter to a good ground.
(3) With the voltmeter positive lead, check both
terminals of the circuit breaker for battery voltage.
If only one terminal has battery voltage, the circuit
breaker is faulty and must be replaced. If neither ter-
minal has battery voltage, repair the open circuit
from
the
Power
Distribution
Center
(PDC)
as
required.
POWER SEAT ADJUSTER AND MOTORS
For circuit descriptions and diagrams, refer to
8W-63 - Power Seat in Group 8W - Wiring Diagrams.
Operate the power seat switch to move all three
seat motors in each direction. The seat should move
in each of the selected directions. If the power seat
adjuster fails to operate in only one direction, move
the adjuster a short distance in the opposite direction
and test again to be certain that the adjuster is not
at its travel limit. If the power seat adjuster still
fails to operate in only one direction, see Power Seat
Switch in the Diagnosis and Testing section of this
group. If the power seat adjuster fails to operate in
more than one direction, proceed as follows:
(1) Test the circuit breaker in the junction block as
described in this group. If OK, go to Step 2. If not
OK, replace the faulty circuit breaker.
(2) Remove the power seat switch from the seat.
Check for battery voltage at the fused B(+) circuit
cavity of the power seat switch wire harness connec-
tor. If OK, go to Step 3. If not OK, repair the open
circuit to the junction block as required.
(3) Check for continuity between the ground cir-
cuit cavity of the power seat switch wire harness con-
nector
and
a
good
ground.
There
should
be
continuity. If OK, go to Step 4. If not OK, repair the
open circuit to ground as required.
(4) Test the power seat switch as described in this
group. If the switch tests OK, check the wire harness
for the inoperative power seat motor(s) between the
power seat switch and the motor for shorts or opens.
If the circuits check OK, replace the faulty power
seat adjuster and motors assembly. If the circuits are
not OK, repair the wire harness as required.
POWER SEAT SWITCH
For circuit descriptions and diagrams, refer to
8W-63 - Power Seat in Group 8W - Wiring Diagrams.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the power seat switch from the power
seat.
(3) Use an ohmmeter to test the continuity of the
power seat switches in each position. See the Power
Seat Switch Continuity chart (Fig. 1). If OK, see the
diagnosis for the Power Seat Adjuster and Motors in
this group. If not OK, replace the faulty power seat
switch module.
8R - 2
POWER SEAT SYSTEMS
XJ
DESCRIPTION AND OPERATION (Continued)
REMOVAL AND INSTALLATION
POWER SEAT SWITCH
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the three screws that secure the seat
cushion side shield to the outboard seat cushion
frame.
(3) Pull the seat cushion side shield away from the
seat cushion frame far enough to access the power
seat switch wire harness connector.
(4) Unplug the wire harness connector from the
power seat switch.
(5) Remove the seat cushion side shield from the
seat.
(6) Remove the two screws that secure the power
seat switch to the inside of the seat cushion side
shield (Fig. 2).
(7) Remove the power seat switch from the seat
cushion side shield.
(8) Reverse the removal procedures to install.
Tighten the mounting screws to 2.2 N·m (20 in. lbs.).
POWER SEAT ADJUSTER AND MOTORS
(1) Move the seat to its fully raised and fully for-
ward position, if possible.
(2) Disconnect and isolate the battery negative
cable.
(3) For the driver side power seaat only, unplug
the seat belt switch wire harness connector from the
driver side seat belt buckle half on the inboard side
of the seat (Fig. 3).
(4) Unplug the power seat wire harness connector
from the body wire harness connector.
Fig. 1 Power Seat Switch Continuity
POWER SEAT SWITCH
LEFT SEAT SWITCH
SWITCH POSITION
CONTINUITY BETWEEN
Off
B-E, B-J, B-K, B-L,
B-M, B-N
Vertical Up
A-J, A-M, B-E, B-N
Vertical Down
A-E, A-N, B-J, B-M
Horizontal Forward
A-L, B-K
Horizontal Rearward
A-K, B-L
Front Tilt Up
A-M, B-N
Front Tilt Down
A-N, B-M
Rear Tilt Up
A-J, B-E
Rear Tilt Down
A-E, B-J
RIGHT SEAT SWITCH
SWITCH POSITION
CONTINUITY BETWEEN
Off
A-E, A-J, A-K, A-L,
A-M, A-N
Vertical Up
A-J, A-N, B-E, B-M
Vertical Down
A-E, A-M, B-J, B-N
Horizontal Forward
A-L, B-K
Horizontal Rearward
A-K, B-L
Front Tilt Up
A-N, B-M
Front Tilt Down
A-M, B-N
Rear Tilt Up
A-J, B-E
Rear Tilt Down
A-E, B-J
Fig. 2 Power Seat Switch Remove/Install
1 – SEAT SIDE SHIELD
2 – POWER SEAT SWITCH
3 – SCREWS
XJ
POWER SEAT SYSTEMS
8R - 3
DIAGNOSIS AND TESTING (Continued)
(5) Remove the two screws that secure the front of
the seat adjuster frame to the floor panel seat
mounting reinforcement (Fig. 4).
(6) Remove the screw that secures the outboard
rear of the seat adjuster frame to the floor panel.
(7) Remove the nut that secures the inboard rear
of the seat adjuster frame to the stud on the floor
panel.
(8) Remove the seat and the power seat adjuster
and motors assembly from the vehicle as a unit.
(9) Remove the four nuts that secure the power
seat adjuster and motors assembly to the seat cush-
ion frame (Fig. 5).
(10) Remove the power seat switch from the out-
board side of the seat. Refer to Power Seat Switch
in the index of this service manual for the location of
the proper power seat switch removal and installa-
tion procedures.
(11) Disengage the power seat switch wire harness
and connector from the seat cushion frame.
(12) Remove the power seat adjuster and motors
assembly from the seat cushion frame.
(13) Reverse the removal procedures to install.
Tighten the seat mounting hardware as follows:
• Seat adjuster to seat cushion frame nuts - 25
N·m (18 ft. lbs.)
• Seat adjuster to floor panel screws - 27 N·m (20
ft. lbs.)
• Seat adjuster to floor panel nut - 40 N·m (30 ft.
lbs.).
Fig. 3 Driver Seat Belt Switch Connector
1 – DRIVER SIDE FRONT SEAT
2 – SEAT BELT SWITCH CONNECTOR
3 – BODY WIRE HARNESS CONNECTOR
Fig. 4 Power Seat Remove/Install
1 – NUT
2 – DRIVER SIDE FRONT SEAT
3 – SCREW
4 – STUD
5 – SCREW
Fig. 5 Power Seat Adjuster and Motors Remove/
Install
1 – POWER SEAT ADJUSTER AND MOTORS
2 – SEAT CUSHION FRAME
3 – SEAT CUSHION FRAME
8R - 4
POWER SEAT SYSTEMS
XJ
REMOVAL AND INSTALLATION (Continued)
POWER WINDOW SYSTEMS
TABLE OF CONTENTS
page
page
GENERAL INFORMATION
DESCRIPTION AND OPERATION
POWER WINDOW SWITCH . . . . . . . . . . . . . . . . . 1
DOOR MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . 2
POWER WINDOW MOTOR. . . . . . . . . . . . . . . . . . 2
CIRCUIT BREAKER . . . . . . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING
POWER WINDOW SYSTEM . . . . . . . . . . . . . . . . . 2
CIRCUIT BREAKER . . . . . . . . . . . . . . . . . . . . . . . . 3
DOOR MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . 3
POWER WINDOW SWITCH . . . . . . . . . . . . . . . . . 4
POWER WINDOW MOTOR. . . . . . . . . . . . . . . . . . 4
REMOVAL AND INSTALLATION
DOOR MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . 4
POWER WINDOW SWITCH . . . . . . . . . . . . . . . . . 5
POWER WINDOW MOTOR. . . . . . . . . . . . . . . . . . 6
GENERAL INFORMATION
INTRODUCTION
Power windows are available as factory-installed
optional equipment on this model. The power lock
system and power mirror system are included on
vehicles equipped with the power window option.
Refer to 8W-60 - Power Windows in Group 8W - Wir-
ing Diagrams for complete circuit descriptions and
diagrams.
NOTE: This group covers both Left-Hand Drive
(LHD) and Right-Hand Drive (RHD) versions of this
model. Whenever required and feasible, the RHD
versions of affected vehicle components have been
constructed as mirror-image of the LHD versions.
While most of the illustrations used in this group
represent only the LHD version, the diagnostic and
service
procedures
outlined
can
generally
be
applied to either version. Exceptions to this rule
have been clearly identified as LHD or RHD, if a
special illustration or procedure is required.
POWER WINDOW SYSTEM
The power window system allows all of the door
windows to be raised and lowered electrically by
actuating a switch on the trim panel of each respec-
tive door. Additionally, a set of master switches on
the driver side front door trim panel allows the
driver to raise or lower each of the passenger door
windows. A power window lockout switch on the
driver side front door trim panel can prevent the pas-
senger door windows from being operated, except
from the master switches. The power window system
receives battery current through a circuit breaker in
the junction block, only when the ignition switch is
in the On or Accessory positions.
The power window system includes the power win-
dow switches on each door trim panel, the circuit
breaker in the junction block, and the power window
motors inside each door. This group covers diagnosis
and service of only the electrical components in the
power window system. For service of mechanical
components, such as the regulator, lift plate, window
tracks, or glass refer to Group 23 - Body.
Following are general descriptions of the major
components in the power window system. Refer to
the owner’s manual in the vehicle glove box for more
information on the features, use and operation of the
power window system.
DESCRIPTION AND OPERATION
POWER WINDOW SWITCH
The individual power windows are controlled by a
two-way momentary switch mounted on the trim
panel of the passenger side front door trim panel
and, on four-door models, on each of the rear door
trim panels. Two-way momentary master switches on
the driver side front door trim panel control all of the
power windows in the vehicle. The driver side front
door trim panel also has a two-position power win-
dow lockout switch.
The front door power window switches and the
power window lockout switch are integral to the
Driver Door Module (DDM) or Passenger Door Mod-
ule (PDM), respectively. The rear door power window
switches are stand-alone units.
Each power window switch controls its power win-
dow motor by switching battery current and ground
XJ
POWER WINDOW SYSTEMS
8S - 1
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