General Information - Dodge RAM TRUCK 1500 1995 Service Manual

B R
— POWER _ WINDOWS 8S - 1
POWER WINDOWS
C O N T E N T S
page page
DIAGNOSIS
...........1
SERWICE PROCEDURES 3
GENERAL INFORMATION 1
G E N E R A L I N F O R M A T I O N
Power door windows are optional 'equipment on
Earn truck models. The power windows operate only
with the ignition switch in the ON position. This
group covers diagnosis and service of the electrical
components peculiar to the power window system.
For service of mechanical components such as the
regulator, lift plate or window tracks refer to Group
23 - Body Components.
Following are general descriptions of the major
components in the power window system. Eefer to
Group 8W - Wiring Diagrams for complete circuit de­
scriptions and diagrams.
POWER WINDOW SWITCH
Both door windows can be raised or lowered elec­
trically by operating the dual two-way switches on
the driver's door panel. A single two-way switch on
the passenger's door panel operates only the window
on the passenger's side. The switches cannot be re­
paired. If faulty, they must be replaced.
POWER WINDOW MOTOR
A permanent magnet motor moves the window reg­
ulator through an - integral gearbox mechanism. A
positive and negative battery connection to the two
motor terminals will cause the motor to rotate in one
direction. Reversing current through these same two
connections will cause the motor to rotate in the op­
posite direction. In addition, each power window mo­
tor is equipped with an integral automatic re-setting
circuit breaker to protect the motor from overloads.
The power window motor and gearbox assembly can­
not be repaired. If faulty, the entire assembly must
be replaced.
CIRCUIT BREAKER
An automatic re-setting circuit breaker in the fuse-
block module is used to protect the power window
system circuit. The circuit breaker can protect the
system from a short circuit, and can also protect the
system from an overload condition caused by an ob­
structed or stuck window glass or regulator. The cir­
cuit breaker can not be repaired. If faulty, it must be
replaced.
D I A G N O S I S
It is necessary that the window be free to slide up
and down for the power window system to function
properly. If the window is not free to move up and
down, the motor will overload and trip the circuit
breaker. To determine if the glass is free, disconnect
regulator plate from the glass and slide window up
and down by hand.
An alternate method is to shake the glass in the
door, with the glass positioned between the up and
down stop positions. Check that the' glass can be
moved slightly from side to side, front to rear, and up
and down. Then check that window is not bound
tight in the tracks. If window is free, proceed with di­
agnosis that follows. If window is not free, refer to
Group 23 - Body Components for service procedures.
CIRCUIT 1REAKER
Locate correct circuit breaker in fuseblock module.
Pull out slightly, but be sure that circuit breaker ter­
minals still contact terminals in fuseblock module.
Turn ignition switch to ON position. Connect ground
wire of voltmeter to a good ground. With probe of
voltmeter positive lead, check both terminals of cir­
cuit breaker for battery voltage. If only one terminal