Question about 2004 Dodge Ram 1500

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No power at the Blower

Ok here it is I replaced the resistor the HVAC controls the the relays under the hood in the fuse box and there is still no power at the wires going into the blower. i even hook up the blower motor directly to power to make sure its working and it is. I am at my ends here and don't know what to do with this thing anymore if anyone has any insight it would be awesome! thank you

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  • Dodge Master
  • 21,873 Answers

Have you actually tested any of the fuses or relays for power ?
Fuse number 2 is hot from the key switch and powers the blower relay. Fuse number 12 is a 40amp fuse that gets power from the battery and powers the blower motor thru the relay.
Are both fuses hot with the key on ?

Posted on Jul 12, 2013

Testimonial: "So I got it figured out the fuses were all ok, it was the power leading to the ignition when I put pressure on the harness itself (at thr steering wheel) it started blowing."


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SOURCE: 1999 Grand AM Heater blower

Your Resister module for blower speeds is shorted, follow the wire from your blower it will connect to it, should be in blower duct near blower motor, two screws remove and pull from duct and replace or repair, I have been able to resolder them sometimes.

Posted on Dec 28, 2008

  • 405 Answers

SOURCE: No power to blower motor resistor

Bad ground is only solution !

Posted on Dec 29, 2008

  • 5 Answers

SOURCE: 04 stratus blower not working

You might have an interconnection problem. I hate these problems, they can be really tough. I had something similar that turned out to be a bad ground connection, but you said that "Relay in box under hood is good and has 12.5 volts going to 1 post"... well OK, good, but then you said "switched the Relays around and everything else worked fine"... well OK, but if it didn't work fine before, you may have a bad relay or maybe a bad connection, so swap them back and see what happens to help isolate the problem. You also said "Ran hot to fan and it works", well in that case, it's not a ground connection at the fan, but still could be further back. It could be bad relay. Good luck to you on that one... as I said... I really hate these kinds of problems. Try to get hold of a wiring diagram if you haven't already. This problem is going to take some patience, but you’ll find it.

Posted on Jun 09, 2009

  • 56 Answers

SOURCE: 1996 Dodge Dakota A/C blower motor problem

You may have 2 problems - the blower motor I believe should have power all the time and the speed is controlled by grounding the circuit through the various resistors. I think you need to get some wiring diagrams.

Posted on Jun 27, 2009

  • 1068 Answers

SOURCE: no power getting to the front blower

no. the relays coil is fused # 12 fuse 10 amp and the other side is going directly to ground. the main power for blower goes through that relay and it is fused at # 107 and it is a 40 amp fuse. now the heater control unit witch is what they dials are controls the ground to the blower motor at different resistances with is determine by the dial to change speed.

now if you don't have power with key on at the blower motor i would check them to fuses and if they are okay you need to check the ground at relay socket witch will be the corresponding cavity for # 85 on the relay. if you have all of that and sill no power at blower replace relay.

but to tell you what i see most common is the blower resistor for the motor.

let me know if you have any more question and good luck

Posted on Nov 26, 2009

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Do you know how to test automotive electrical circuit's , looking at a wiring diagram so you know what all is involved in the blower motor circuit . Using a DVOM - digital volt ohm meter to test the circuit . Free wiring diagram's here Enter vehicle info. year , make , model an engine size . Under system click HVAC ,then under subsystem click on HVAC controls . Click the search button then the blue link .The thing's that could be wrong , blower motor it's self , the blower motor controller for automatic climate control , a blown fuse -but fuse's don't just blow for no reason - short to ground maybe ! 40 amp fuse #1 in the under hood fuse box . Blower motor resistor block if your vehicle has manual climate control .
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