Jeep Cherokee 2000 Service Manual - page 546
the glass can be moved slightly from side to side,
front to rear, and up and down. Then check that the
glass is not bound tight in the tracks. If the glass is
free, proceed with the diagnosis that follows. If the
glass is not free, refer to Group 23 - Body for the
door window glass and hardware service and adjust-
ment procedures.
(1) Check the power window switch continuity as
described in the diagnosis for the Door Module (front
doors) or Power Window Switch (rear doors) in this
group. If OK and the driver side front window is
inoperative, see the Power Window Motor diagnosis
in this group. If OK and the inoperative window is
other than the driver side front, go to Step 2. If not
OK, replace the faulty door module or switch.
(2) Refer to the circuit diagrams in 8W-60 - Power
Windows in Group 8W - Wiring Diagrams. Check the
continuity in each circuit between the inoperative
Passenger Door Module (PDM) or power window
switch wire harness connector cavities and the corre-
sponding Driver Door Module (DDM) wire harness
connector cavities. If OK, see the diagnosis for the
Power Window Motor in this group. If not OK, repair
the open circuit(s) as required.
NOTE: All
individual
power
window
switches
receive their battery and ground feeds through the
Driver Door Module (DDM) and wire harness con-
nectors.
CIRCUIT BREAKER
For circuit descriptions and diagrams, refer to
8W-60 - Power Windows in Group 8W - Wiring Dia-
grams.
(1) Locate the circuit breaker in the junction block.
Pull out the circuit breaker slightly, but be certain
that the circuit breaker terminals still contact 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. If the circuit breaker checks OK, but no
power windows operate, see Power Window System
in the Diagnosis and Testing section of this group.
DOOR MODULE
The Driver Door Module (DDM) contains the mas-
ter switches and the lockout switch in the power win-
dow system. The DDM also contains an integrated
circuit to support the one-touch down feature of the
driver side front door power window. Remember that
the passenger side front door power window switch
and, on four-door models, the rear door power win-
dow switches get their battery current through the
power window lockout switch in the Driver Door
Module (DDM). In addition, each individual power
window switch gets its ground through the master
switch in the DDM.
The one-touch down feature circuitry within the
DDM will not operate the power window motor if the
door glass, window regulator, or gearbox mechanism
are stuck, obstructed, or binding. If the driver side
front door power window operates as designed, but
the one-touch down feature is inoperative, replace
the faulty DDM.
If the problem being diagnosed is an inoperative
power window switch illumination lamp, but the
power window switch operates as designed, replace
the faulty door module. For circuit descriptions and
diagrams, refer to 8W-60 - Power Windows in Group
8W - Wiring Diagrams.
(1) Disconnect and isolate the battery negative
cable. Remove the front door trim panel and unplug
the door module wire harness connectors from the
door module.
(2) Check the door module power window switch
and/or power window lockout switch continuity in
each position, as shown in the proper chart (Fig. 1)
or (Fig. 2). If OK, see the Power Window Motor diag-
nosis in this group. If not OK, replace the faulty door
module.
Fig. 1 DDM Power Window Switch Continuity
SWITCH POSITION
CONTINUITY BETWEEN
OFF (NORMAL)
1&8,2&8,3&8,4&8,5&8,6&8,10&8,12&8
RIGHT REAR DOWN
1&9,2&8
RIGHT REAR UP
2&9,1&8
RIGHT FRONT UP
3&9,6&8
LEFT REAR UP
4&9,10&8
LEFT FRONT UP
5&9,12&8
RIGHT FRONT DOWN
6&9,3&8
LEFT REAR DOWN
10&9,4&8
LEFT FRONT DOWN
12&9,5&8
SWITCH POSITION
CONTINUITY BETWEEN
LOCKOUT OFF (UP)
C1 PIN 8 & C2 PIN 9
LOCKOUT ON (DOWN)
NO CONTINUITY BETWEEN C1 PIN 8 & C2 PIN 9
XJ
POWER WINDOW SYSTEMS
8S - 3
DIAGNOSIS AND TESTING (Continued)