2002 Dodge Caravan Fans won't stop blowing

MDALTON5

MEMBER
2002 DODGE CARAVAN
4 CYL
2WD
AUTOMATIC
66,000 MILES

I'm not sure what the engine size is, nor if it's a 2 wheel drive or all front wheel drive. But. Here's my problem.

The vents will not stop blowing air. If I have just the outside air coming in and push the off button. Then the air conditioning comes on. The amount of air button does not do anything. It stays the same amount of air blowing no matter which way you turn it! The heater and a/c work. When I turn either of them on. It's like something is stuck behind there! Help! Do you suppose it's an electrical problem?

Thanks!

1 Reply

MERLIN2021

MECHANIC
17,250 POSTS

BLOWER MOTOR RESISTOR (FRONT) 1. Disconnect and isolate the battery negative cable. Disconnect the instrument panel wire harness connector for the blower motor resistor and the blower motor pigtail wire connector from the resistor connector receptacles. 2. Check for continuity between each of the blower motor switch input terminals of the blower motor resistor and the resistor output terminal. In each case there should be continuity. If okay, repair the instrument panel wire harness circuit between the blower motor switch and the blower motor resistor or the blower motor pigtail wires as required. If not okay, replace the faulty blower motor resistor. Page 1 of 1 MANUAL A/C-HEATER SYSTEMS -2002 Dodge Caravan SE 2/8/2009
BLOWER MOTOR RELAY The blower motor relay, see Fig. 30 , is located in the Intelligent Power Module (IPM), which is in the engine compartment near the battery. See the fuse and relay layout map molded into the inner surface of the IPM cover for front blower motor relay identification and location. Remove the relay from the IPM to perform the following tests: 1. A relay in the de-energized position should have continuity between relay terminals No. 87A and 30, and no continuity between relay terminals No. 87 and 30. If okay, go to step 2. If not okay, replace the faulty relay. 2. Resistance between relay terminals No. 85 and 86 (electromagnet) should be 70-80 ohms. If okay, go to step 3. If not okay, replace the faulty relay. 3. Connect a fused jumper wire from battery voltage to relay terminal No. 85 and ground relay terminal No. 86. There should now be continuity between relay terminals 30 and 87, and no continuity between relay terminals No. 87A and 30. If okay, use a DRBIII � scan tool to perform further diagnosis of the relay circuits. See SELF-DIAGNOSTIC SYSTEM . If not okay, replace the faulty relay. Fig. 30: Exploded View Of Blower Motor Relay Courtesy of CHRYSLER CORP. NOTE: Relay terminal numbers are different than wiring harness connector terminal numbers. For relay terminal circuit reference, see Fig. 4 and WIRING DIAGRAMS. Page 1 of 1 MANUAL A/C-HEATER SYSTEMS -2002 Dodge Caravan SE 2/8/2009 The relay is under the hood in the IPM next to the battery.