Dodge Intrepid Service Manual page 952

LH
POWER MODULE (Continued)
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN AN ACCIDENTAL
AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Open hood and disconnect the negative battery
cable remote terminal from the remote battery pos-
t(Refer to 8 - ELECTRICAL/BATTERY SYSTEM/CA-
BLES - REMOVAL).
(2) Remove lower right underpanel silencer/duct.
(3) Disconnect wiring connector to the power mod-
ule.
(4) Remove the power module retaining screws.
(5) Pull the power module out of HVAC housing.
INSTALLATION
(1) Install the power module in the HVAC housing.
(2) Install the two screws that secure the power
module to the HVAC housing and tighten to 2.2 N·m
(20 in. lbs.).
(3) Plug in the harness connector to the power
module.
(4) Install the lower right underpanel silencer/
duct.
(5) Connect the negative battery cable remote ter-
minal to the remote battery post(Refer to 8 - ELEC-
TRICAL/BATTERY
INSTALLATION).
BLOWER MOTOR RESISTOR
BLOCK
DESCRIPTION
Vehicles with manual air conditioning (non-ATC)
systems will have a blower motor resistor block. The
resistor block is mounted to the lower right side of
the HVAC housing in the passenger compartment,
where it can be accessed for service.
The blower motor resistor has multiple resistor
wires, each of which will change the resistance in the
blower motor ground path to change the blower
motor speed. The blower motor switch directs the
SYSTEM/CABLES
ground path through the correct resistor wire to
obtain the selected blower motor speed.
The blower motor resistor cannot be repaired and,
if faulty or damaged, it must be replaced.
OPERATION
With the blower motor switch in the lowest speed
position the ground path for the motor is applied
through all of the resistor wires. Each higher speed
selected with the blower motor switch applies the
blower motor ground path through fewer of the resis-
tor wires, increasing the blower motor speed. When
the blower motor switch is in the highest speed posi-
tion, the blower motor resistor is bypassed and the
blower motor receives a direct path to ground.
DIAGNOSIS AND TESTING - BLOWER MOTOR
RESISTOR BLOCK
For circuit descriptions and diagrams, (Refer to
Appropriate Wiring Information).
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN AN ACCIDENTAL
AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Disconnect and isolate the battery negative
cable.
-
(2) Unplug the wire harness connector from the
blower motor resistor.
(3) Check for continuity between each of the
blower motor switch input terminals of the resistor
and the resistor output terminal. In each case there
should be continuity. If OK, repair the wire harness
circuits between the blower motor switch and the
blower motor resistor or blower motor as required. If
not OK, replace the faulty blower motor resistor.
CONTROLS 24 - 15