Hi all - this tutorial gave me confidence to change out my resistor. Thank you! I'll need to replace the harness, too as the wires are corroded and a risk. I want to replace the blower motor as well. Is this the part with the black and green wires coming from it? Any help would help!
[HOW-TO][HVAC][Gen III Dakota][Gen I Durango] Blower Resistor Diagnosis/Replacement
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FYI everyone I had a problem with my blower motor not running at all. I replaced the resistor this morning and the motor was working fine. Wen I went to go to work this afternoon it did not work again. I removed the resistor and noticed that the connector was melted. When I got to work I ohm'ed the resistor and it was still good. Being in Michigan and knowing it will be freezing cold in the morning and I knew I had to change the connector anyways I cut the wires for pin 1 and 2 and wire nuted them together. Works fine on high speed for a quick fix.
Water in blower motor: I have an 04 Dodge Dakota. My second AC/Heater blower motor has died due to having water in it. The thermistor is fine. The water is clear not green, and I can't detect any leaks in the heater core. Any suggestions as to where the water might be coming from?
I will be forever grateful for whatever help can be given.
Thank you,
John
I will be forever grateful for whatever help can be given.
Thank you,
John
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280 Posts
Last winter I replaced the resistor pack cause my 01 Dak blower had quit entirely. I put in the new resistor pack and all was good,....until last month. Now being winter again it is acting up. Similar, but not the same.
The blower works fine on speeds 3 and 4, nothing on 1 or 2. So I'm checking the resistor again. Couple of things though:
1. I still had the old resistor, and pin 2 is burned, which is the power input pin. When I put my VOM to it, all the readings are open for all pin combinations. That checks with the way it was not working on any speeds.
3. The resistor that just failed, looks burned on pin 3, but pin 2 is fine. So that explains why it works on two, but not all four speeds.
4. On occasion, I get a faint smell of antifreeze in the cab, just every now and then. But the water/glycol level in the system is good. Is it possible I have a pending leak issue in an area that drops water onto the resistor connector?
Where the resistor mounts, if there is a water/antifreeze source near it or right above it, it would have to drip directly onto it, if that is the problem causing the failure. Also, where the resistor mounts, it is raised up from the bottom of the duct, so water/glycol would have pool up to reach the resistor. I wonder if I have a pending heater core problem waiting to happen? Never seen any water/glycol in the cab on the floor, but I get the occasional hint of antifreeze smell in the cab.
So I got another replacement (OEM this time) resistor at the local dealer for less than $7, part number 0506 1575 AA-001. Installed it and all fan speeds are back to normal again. Perhaps the replacement I had before was a lesser quality aftermarket part. The OEM part has a translucent mount base like the original. But the aftermarket one had a solid grey base, without some fo the same details as the original one. We'll see how long this one lasts.
The blower works fine on speeds 3 and 4, nothing on 1 or 2. So I'm checking the resistor again. Couple of things though:
1. I still had the old resistor, and pin 2 is burned, which is the power input pin. When I put my VOM to it, all the readings are open for all pin combinations. That checks with the way it was not working on any speeds.
3. The resistor that just failed, looks burned on pin 3, but pin 2 is fine. So that explains why it works on two, but not all four speeds.
4. On occasion, I get a faint smell of antifreeze in the cab, just every now and then. But the water/glycol level in the system is good. Is it possible I have a pending leak issue in an area that drops water onto the resistor connector?
Where the resistor mounts, if there is a water/antifreeze source near it or right above it, it would have to drip directly onto it, if that is the problem causing the failure. Also, where the resistor mounts, it is raised up from the bottom of the duct, so water/glycol would have pool up to reach the resistor. I wonder if I have a pending heater core problem waiting to happen? Never seen any water/glycol in the cab on the floor, but I get the occasional hint of antifreeze smell in the cab.
So I got another replacement (OEM this time) resistor at the local dealer for less than $7, part number 0506 1575 AA-001. Installed it and all fan speeds are back to normal again. Perhaps the replacement I had before was a lesser quality aftermarket part. The OEM part has a translucent mount base like the original. But the aftermarket one had a solid grey base, without some fo the same details as the original one. We'll see how long this one lasts.
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If I only had the time...
Blower motor- $110
Blower resistor-$14
Fixing them and then finding you could have bought the same parts on rockauto.com for less than $55 including shipping... Priceless.
Blower motor- $110
Blower resistor-$14
Fixing them and then finding you could have bought the same parts on rockauto.com for less than $55 including shipping... Priceless.
Yes, if you can... find a kit to do the blower, harness and resistor.
I burnt up another 2 resistors before breaking down and doing it right.
All parts easily accessible and it's an easy job. The resistor alone will give you a temp fix until it melts again.
I got a full kit on Amazon much cheaper than your local shop.
I burnt up another 2 resistors before breaking down and doing it right.
All parts easily accessible and it's an easy job. The resistor alone will give you a temp fix until it melts again.
I got a full kit on Amazon much cheaper than your local shop.
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125 Posts
So I've had my Dakota for 1.5 years. I have replaced the resistor 3 times. The 3rd time, I replaced the plug and wires due to them burning up as well as the bower motor. That worked from Sep '16 until now (jul '17). Just today the blower stopped and started back again. Now, pin #2 burned up again on the resistor and on the plug. I'm not sure what else to replace since it's all been gone through. Any ideas on what my issue is? I went to Advanced Auto and spent another $12 on a BWD resistor instead of the cheaper Doorman brand. Maybe it'll last longer...maybe not.
What else could be causing my resistors/plug to burn up?
What else could be causing my resistors/plug to burn up?
Have you replaced the blower motor yet?
Too much current through it will cause the resistor to run hotter.
RwP
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125 Posts
Hey Ralph, yes I've replaced the motor. The old one worked but I figured it was drawing too much power or something. I bought one on RockAuto, a new one (not a refurb). I would think maybe moisture is getting into the sensor, but it's only pine 2 that had issues, which is the power wire. I can throw some dielectric grease on it but I doubt moisture is the culprit.
Any ideas?
I guess I could check the blower motor relay under the hood and clean it and all.
Dielectric grease does three things.
1) It helps to keep oxygen from the contact, which helps slow down oxidation.
2) It helps keep water from the contact, which also helps slow down oxidation.
And the important one for these:
3) It helps the heat produced ANYWAY to conduct away from the contact and spreads it out.
So yes, I'd dope that up with some dielectric grease.
RwP
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125 Posts
Update: just driving it on lunch today burnt up my brand new resistor. The wires on the plug were too hot to even touch. With a new motor, new plug and new resistor...what could be the issue with it getting to much power?
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125 Posts
I bought the motor brand new in last September through RockAuto. I'm not sure of the draw yet, I still have to check that. If I cant figure this out, I'll likely order the factory Chrystler fan, wire and resistor. I don't want to pay that much, but maybe then it'll work like it should. The fan itself is $133 from the Chrystler website, I paid $41 at RockAuto, maybe it's the name maybe it's the quality.
Fan P/N: 04885669AC ; 04885669AA; 04885669AD; 04885669AB
Resistor P/N: 05061575AA ; 04885635AC; 04885635AA; 04885635AB; 05061383AA; 05174618AA
ALl found here: http://www.factorychryslerparts.com...0300&ukey_driveLine=6803&ukey_trimLevel=18676
Fan P/N: 04885669AC ; 04885669AA; 04885669AD; 04885669AB
Resistor P/N: 05061575AA ; 04885635AC; 04885635AA; 04885635AB; 05061383AA; 05174618AA
ALl found here: http://www.factorychryslerparts.com...0300&ukey_driveLine=6803&ukey_trimLevel=18676
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3 Posts
I purchased one at AutoZone doorman brand I believe it was $20 and includes
a connector
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