Chrysler Dodge Caravan 2002 Manual page 2281

24 - 38 CONTROLS - REAR
POWER MODULE (Continued)
voltage is applied to a comparator circuit which com-
pares the PWM signal voltage to the blower motor
feedback voltage. The resulting output drives the
power module circuitry, which adjusts the voltage
output received from the blower motor relay to
change or maintain the desired blower speed. The
blower power module is diagnosed using a DRBIII
scan tool. Refer to the appropriate diagnostic infor-
mation.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the right quarter trim panel and right
D-pillar trim panel from the quarter inner panel.
(Refer to 23 - BODY/INTERIOR/QUARTER TRIM
PANEL - REMOVAL).
(3) Disconnect the rear HVAC wire harness con-
nector for the blower power module from the resistor
connector receptacle (Fig. 12).
(4) Disconnect the blower motor pigtail wire con-
nector from the blower power module connector
receptacle.
(5) Remove the two screws that secure the blower
power module to the rear heater-A/C unit housing.
(6) Remove the blower power module from the rear
heater-A/C unit housing.
INSTALLATION
(1) Position the blower power module into the rear
heater-A/C unit housing.
(2) Install and tighten the two screws that secure
the blower power module to the rear heater-A/C unit
housing. Tighten the screws to 2 N·m (17 in. lbs.).
(3) Reconnect the blower motor pigtail wire to the
blower power module connector receptacle.
(4) Reconnect the rear HVAC wire harness connec-
tor for the blower power module to the module con-
nector receptacle.
Fig. 12 Power Module
1 - REAR HEATER-A/C UNIT HOUSING
2 - SCREW (2)
3 - D-PILLAR
4 - BLOWER PIGTAIL WIRE
5 - REAR HVAC WIRE HARNESS
6 - EXPANSION VALVE
7 - BLOWER POWER MODULE
(5) Reinstall the right quarter trim panel and
right D-pillar trim panel onto the quarter inner
panel. (Refer to 23 - BODY/INTERIOR/QUARTER
TRIM PANEL - INSTALLATION).
(6) Reconnect the battery negative cable.
RS