This Dodge Truck & Jeep Grand Cherokee blower motor resistor is a new, aftermarket replacement part. It is just what you need to bring your heating and A/C blower system back to good working order! On most vehicles it is mounted to the HVAC unit inside the passenger compartment. It can be accessed from the passenger foot well area.


  • Brand New Resistor
  • Replaces dealer part number: 4720278
  • Direct replacement
  • Built to strict quality control standards
  • 100% tested prior to leaving the factory
  • 4 Blade terminal

If you are experiencing intermittent stopping during use or the fan only works in one position this may be your solution!

Our electrical and electronic parts are subject to strict quality control testing .  Once the item has been installed or plugged in, it is no longer eligible for a refund.  The item may be eligible for replacement, only if it is found to have a manufacturing defect. Before purchasing, please ensure proper diagnosis of the failed original part is performed

Left Hand Drive Note:

“All of our auto parts are intended for Left Hand Drive USDM vehicles and might not have been tested on Right Hand Drive platforms. If your vehicle is Right Hand Drive, please do your research prior to making a purchase to ensure the part is correct for your specific vehicle.”

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

  1. step : Removing the Blower Motor Resistor (0:32)
    • Locate the resistor under the glove box on the HVAC box
    • Disconnect the wiring harness
    • Remove the two Phillips screws from the resistor
    • Remove the resistor
  2. step : Installing the Blower Motor Resistor (1:51)
    • Insert the blower resistor into place
    • Tighten the two Phillips screws to the resistor
    • Connect the wiring harness

Tools needed for replacement:

    Screwdrivers & Related

  • Phillips Head Screwdriver

4.6 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Good product
Great item. Works as it should. Direct replacement for this factory item.Way cheaper than local part atores.
September 4, 2017
6 months ago
Double wow!
After shopping around, online and with local mechanics/ dealerships, I came across a YouTube video uploaded by 1aauto. After watching the video, I went to the website, products and service were well reviewed. I order the recommended parts, they arrived earlier than expected (yippee)! Parts were well packaged and identical to he original parts. Installation was exactly as demonstrated on video, very simple. I again have a working fan that is less noisy than the original. (Bought new, now 80,000 mi).

Important to note, both parts needed replaced. The resistor was cracked in several places and the fan cage did not spin freely. Great recommendation and awesome pricing!

I highly recommend 1aauto
August 14, 2017
6 months ago
Perfect worked well easy to install fast delivery no complaints!
November 26, 2017
3 months ago
Best value to be had and got to me in 2 days.
Title says it all, really. This was to replace the resistor on a 2007 Ram. Product arrived well packaged within 2 days. Took me less than 5 minutes to install. Works perfectly.
February 8, 2018
3 weeks ago
works great!!!!!!
January 27, 2018
1 month ago
I was able to install this resistor in 2 minutes flat. It worked perfectly when the fan switch was turned on and has continued to function flawlessly. I am happy with the resistor, the quick delivery and the Price Thanks.
July 17, 2017
7 months ago
Resister install
Very easy install ,quickly removal the part replaces the original very well , I would tell my friends or any one that needs these parts to get them from
November 22, 2017
3 months ago
Worked just as good as the OEM parts
Great parts at a great price will buy again from 1a-Auto... all parts fit just like the OEM-Parts!!!!
August 30, 2017
6 months ago
Motor Resistor replacement
Easy to find on the site, Great price, quick shipping and simple installation. Have been telling friends to go onto 1A Auto you cant go wrong.
December 17, 2017
3 months ago
Received a cracked resistor
Was already cracked when I recieved it in the mail
Installed it anyways because I figured it would get me by
Resister crapped out about 1month after installation
February 15, 2017
1 year ago
Response from 1A Auto
We are sorry to hear that the resistor you received was cracked upon receipt. If you would like, please call us at 1-888-844-3393 so we may issue a replacement to ensure the proper functioning of your vehicle's fan.
February 15, 2017
Alex PStaff
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How-to Video:

(02:21 min)

Tools List:

    Screwdrivers & Related

  • Phillips Head Screwdriver

This part replaces:

  • OE # 4720278
  • Dorman 973-020
  • Standard Motor Products RU-109

Vehicle Fit

  • 1994-2006 Dodge Ram 1500 Truck Blower Motor Resistor
  • 2007-2008 Dodge Ram 1500 Truck without Auxiliary Air Conditioning Blower Motor Resistor
  • 1994-2006 Dodge Ram 2500 Truck Blower Motor Resistor
  • 2007-2009 Dodge Ram 2500 Truck without Auxiliary Air Conditioning Blower Motor Resistor
  • 1994-2006 Dodge Ram 3500 Truck Blower Motor Resistor
  • 2007-2009 Dodge Ram 3500 Truck without Auxiliary Air Conditioning Blower Motor Resistor
  • 1993-1996 Jeep Grand Cherokee Blower Motor Resistor
  • 1997-1999 Jeep Grand Cherokee Blower Motor Resistor with Manual Temperature Control
Part #: 1AHBR00007

Ships Same Day for orders placed by 4 P.M. ET

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Customer Feedback

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