Chrysler RAM TRUCK 2500 1994 Service Manual page 514

POWER WINDOWS 8S • 1
POWER WINDOWS
C O N T E N T S
SERVICE PROCEDURES
page
. . . 3
TEST PROCEDURES
page
. . 1
GENERAL INFORMATION
A permanent magnet motor moves each power win­
dow. Each motor raises or lowers the glass when volt­
age is supplied to the motor. The direction the motor
turns depends on the polarity of the supply voltage.
The door switches control the supply voltage polarity.
Each motor is protected by a built-in circuit
breaker. I f a window switch is held on too long with
the window obstructed or after the window is fully
up or down, the circuit breaker opens the circuit. The
circuit breaker resets automatically as i t cools. Do
not allow frequent or consecutive resetting of the cir­
cuit breaker to continue.
T E S T P R O C E D U R E S
I t is necessary that the window be free to slide up
and down i n the glass channels or tubes and tracks.
I f the window is not free to move up and down, the
window motor will not be able to move the glass.
Tb determine i f the glass is free, disconnect the
electric window regulator glass channel from the
glass. Slide window up and down by hand.
A less positive method is to shake the glass i n the
door, (with glass positioned between the up and down
stop positions). I f the glass will move slightly from
side to side, front to rear, and up and down, the win­
dow is probably not bound tight i n the tracks.
DESCRIPTION
With ignition switch i n ON, voltage supply comes
from the 40 amp fuse, cavity 2, i n the power distri­
bution center (PDC) to the 30 amp circuit breaker, i n
cavity 1 of the fuseblock module. Power then goes to
the driver's door switch terminal 4 and passenger
door switch terminal 3. Current flow for the pas­
senger door motor must go through b o t h the
passenger door switch and the driver's door
switch to reach ground.
Both motors are grounded through the driver's door
window switch by a black wire attached to a ground
stud. The stud is located on the driver's side cowl.
SWITCH TEST
For switch testing, remove the switch from its
mounting location. Using an ohmmeter, refer to Figs.
1 and 2 to determine i f continuity is correct i n the up
and down switch positions. I f continuity is correct
perform window lift motor test.
DIAGNOSING POWER DOOR LOCKS
For complete circuit diagrams refer to Group
8W - Wiring Diagrams.
Check fuse i n cavity 2 of P D C . Replace as re­
quired.
(1) Locate circuit breaker i n cavity 1 of fuseblock
module. Pull out slightly but be sure that circuit
breaker terminals still contact terminals i n fuseblock
module. Connect ground wire of voltmeter to a good
ground. With probe of voltmeter positive wire, check
SWITCH POSITION CONTINUITY BETWEEN
O F F
P I N S 1 , 2 , 3 , 5 & 6
O F F
Note: Pin 4 should not have
continuity with a n y of the other
pins in the O F F position.
DRIVER'S
PINS 1 & 4
P I N S 2 & 3
P A S S E N G E R
P I N S 4 & 5
P 1 N S 3 & 6
DRIVER'S PINS 1 & 3
P I N S 2 & 4
P A S S E N G E R
H N S 3 & 5
P I N S 4 & 6
6
4
2
1
J
J948S-9
Fig. 1 Driver's Door Power Window Switch
Continuity