Grand Caravan FWD V6-3.3L VIN 3 Flex Fuel (2002)
Blower Motor: Testing and Inspection
Rear
BLOWER MOTOR INOPERATIVE
1. Check the fuse (Fuse 12 - 25 ampere) in the Intelligent Power Module (IPM). If OK, go to Step 2. If not OK, repair the shorted circuit or
component as required and replace the faulty fuse.
2. Turn the ignition switch to the ON position. Be certain that the rear heater-A/C control power is turned ON. Check for battery voltage at the fuse
(Fuse 12 - 25 ampere) in the IPM. If OK, go to Step 3. If not OK, proceed to diagnosis of the rear blower motor relay.
3. Turn the ignition switch to the OFF position. Disconnect and isolate the battery negative cable. Disconnect the rear HVAC wire harness connector
for the rear blower motor resistor (Manual Temperature Control) or the rear blower power module (Automatic Temperature Control) from the
resistor or module connector receptacle. Reconnect the battery negative cable. Turn the ignition switch to the ON position. Be certain that the rear
heater-A/C control power is turned ON. Check for battery voltage at the fused rear blower motor relay output circuit cavity of the rear HVAC wire
harness connector for the rear blower motor resistor (MTC) or the rear blower power module (ATC). If OK, go to Step 4. If not OK, repair the
open fused front blower motor relay output circuit to the IPM as required.
4. Turn the ignition switch to the OFF position. Disconnect and isolate the battery negative cable. Disconnect the rear blower motor pigtail wire
connector from the take out and connector of the rear HVAC wire harness (MTC) or the connector receptacle of the rear blower power module
(ATC). Use jumper wires to connect a battery and ground feeds to the blower motor pigtail wire connector. The blower motor should operate. If
OK with MTC, proceed to diagnosis of the rear blower motor resistor. If OK with ATC, use a DRB III scan tool to diagnose the rear blower power
module. Refer to the appropriate diagnostic information. If not OK with MTC or ATC, replace the faulty rear blower motor.
