I am hating dodge blowers right about now. I changed out the heat/ac controls, I changed the blower motor resistor, and the blower motor. I checked all the fuses, the recall on the wiring to the resistor has been done already. I checked all the connections they all look good. Does anyone have any other ideas? I am out and so is the dealership.

 

Does the fan work at all???? Perhaps you could start from the beginning about the problem. I don't fully understand what it is you are looking for help with

 

Since last summer the blower has kicked on and off by itself when using the heat or the air. I figured it was a short in the switch. I put it off until just a few days ago it quit all together. Turning the fan switch does nothing. No humming noise nothing like there is no connection at all. I looked on here and found several people had problems with resistors. The blower motor was also getting louder right before it quit. So I figured I would kill 2 birds with one stone I bought the resistor and blower motor. Still nothing. Then I found out there was a recall on the wire connector for the resistor. Called the dealership it had been replaced already. I still checked it and it looked fine. Then I replaced the ac/heat switch today. Still nothing, the dealership doesn't know what it could be since there isn't an actual relay just for the blower. Oh and i checked all the fuses. I don't know what else to look at but would be willing to try just about anything after $550.00 worth of parts and a week of pulling dash components I have just about had it with it.

 

I don't have access to a 2002 FSM for your truck, but, I have to think that there is a relay for the blower in the power distribution box in the engine compartment. Find it and start there. Pull the relay band check it for any burning, then get a 12 volt DC source and a multi meter and check the operation of the relay. If it checks ok, pull the power panel apart and check to see that none of the wires below have burned away or corroded away. They are what connect to the clips that make the contact with the relay you pulled out. If its none of those, you have a BIG job ahead of you figuring out where the wire break is--remeber it takes power and ground to make a circuit. For the heck of it, pull the connector going directly to the fan. figure out which is positive and the other (neg) and hook a battery source to them. If the fan runs, you know its not that, then start working backwards in the wiring until you find power. Incidentally, they have most likely run an actual ground wire in the harness rather than just grounding it to the chasis, so make sure about the ground first musing the ohm measure function in the multi meter....Have I totally confused you or are you on the same page???

 

Nah I get what you are saying, I hooked all the old parts and new ones up and guess what they all work. No dealer returns either so if anyone needs a resistor, blower motor, or ac/heat control with defrost for a 2002 ram quad cab I gotcha covered. I also did a little rigging and figured out that there is no juice to the ac/heat switch so it is either in that first connector the the fan switch or in the wiring out to the fuse/relay I am going to start tracing it. Yippee what fun.

 

My dad's 2003 3500 was having the same problem, looked around allitle bit and noticed the harness under the steering wheel was burnt, took it to the dealer, after replacing nearly the entire AC system, they finnaly listened to us and replaced the harness. Blower works perfect now.

 

thanks guys you gave me some good ideas, after the thoughts about wiring I got my trustee test light out and sure enough no power to the fan switch. I looked around under the steering wheel but there were wires everywhere. I think there was a system in it before I bought it there are a lot of cut wires under there. Tommorrow I am going to hard wire the power portion of that connector into a start only fuse and ground it off to the frame. This should take care of my issue. I appreciate all your input guys.

 

holy crap I have never had that happen before. I hard wired the connector for the ac/heat control to the frame and a power source. 2 seconds later smoke, and very hot power wire. I checked the rear of the connector and there is power coming out where there is supposed to be power going in. Ohh great a freakin short. anybody want to look at all my dash wiring to figure out where some little piece of wire is touching something it isn't supposed to. My dad told me dodge has always had sucky wiring man I should've listened to him.