2003 Dodge Grand Caravan blower runs constantly

Front blower motor relay or the front control module !

Relays don't usually stick on. Look at the controller. It can be scanned.

check the fuse also when changing the resitor you have to take the fuse out and disconnect the battery

J, I am sending you some info to read but it appears that the most likely cause is the blower motor relay. Give the following notes a read and if you need some more help give me a buzz... Best of Luck..

1996 Chrysler Town & Country 3.3L, Vin R 1996 Dodge Grand Caravan ES 3.8L, Vin L 1996 Chrysler Town & Country LX 3.3L, Vin R 1996 Dodge Grand Caravan LE 3.8L, Vin L 1996 Dodge Caravan LE 3.8L, Vin L 1996 Dodge Grand Caravan SE 3.3L, GAS, Vin R, Eng Cfg V6 1996 Dodge Caravan Sport 3.3L 1996 Plymouth Grand Voyager SE 3.3L, GAS, Vin R, Eng Cfg V6 1996 Dodge Grand Caravan ES 3.3L, Vin R 1996 Plymouth Voyager Rallye 3.3L Customer Concern: Front blower does not work; no power to it. Fuse is OK. Tests/Procedures: 1. At the blower motor, there is a Dark Blue wire. This wire should have battery voltage whenever the key is in the "on" position. Power for the blower motor comes from the blower relay.

2. Access the front blower relay, it is located on the driver's side under the dash, near the junction block. There will be four wires going to it. The Dark Green wire should have battery voltage all the time. The Dark Blue wire is going to the motor. The Black/Orange wire should have battery voltage with the key in the "on" position. The Black wire should be grounded at all times. On this circuit, the relay is energized whenever the key is in the "on" position. Potential Causes: Front Blower Relay
Front Blower Relay Wiring
Heater Ventilation Air Conditioner (HVAC) Control Head
Tech Tips: The front blower relay is located under the dash, on the driver's side. It may be necessary to remove the junction block (fuse and relay box) in order to see it. Diagnostic Codes: None

I replaced the fan module under the glovebox on my 2005 Town & Country last night. Mine would not shut off at all with key on. It only blew on high no matter where I set the switch. Mine also had the climate control which makes a difference. If it is not the auto climate control it is usually the blower resistor if the other fan speed selections don't blow at all except on high.

It is pretty much impossible for the blower resistor to be causing the blower to keep running. The blower relay, on the other hand, is very likely to cause your problem. The contacts on the relay can stick and provide power to the motor when it is not wanted. It is located in the "Integrated Power Module" (Fuse and Relay box) located on the drivers side fender area in the engine compartment. There should be a diagram on the inside of the box cover to show you which one it is.

Sounds like resistor is faulty. I believe on that vehicle, look up under dash behind glove box, and you should see blower & the harness that runs from it to a resistor attached to housing/duct. Pull connector off to stop blower. Replace resistor.

yes it will run on high with the resistor unpluged i would have to say your resistor is bad if it does not work at any other speed than high please rate and let me know -jeff

sounds to me the resistor is shorting out

Its located by the blower fan intake