★★★★★
August 10, 2025
Quality
Replaces
About TRQ:
TRQ is a trusted brand dedicated to making every repair a success story by combining premium parts with easy installation. Each TRQ part is engineered by a team of automotive experts to meet or exceed OEM standards, delivering enhanced performance and maximum longevity. With rigorous in-house testing, the brand ensures superior fit and function across every product line. TRQ also provides customers with best-in-class, step-by-step installation videos—so you can complete repairs with confidence, whether you're a first-time DIYer or an industry professional.
Returns: Parts with electrical components cannot be returned once installed.
Left Hand Drive:
All of our auto parts are intended for Left Hand Drive USDM vehicles. If your vehicle is Right Hand Drive, please ensure the part is correct for your specific vehicle.
Attention California Customers:
WARNING: This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
This part fits 8 vehicles spanning 1993-2009.
| Year | Make | Model | Description |
|---|---|---|---|
| 1994-2006 | Dodge | Ram 1500 Truck | Dodge Ram 1500 Truck Blower Motor Resistor TRQ HCA40090 |
| 2007-2008 | Dodge | Ram 1500 Truck | Dodge Ram 1500 Truck without Auxiliary Air Conditioning Blower Motor Resistor TRQ HCA40090 |
| 1994-2006 | Dodge | Ram 2500 Truck | Dodge Ram 2500 Truck Blower Motor Resistor TRQ HCA40090 |
| 2007-2009 | Dodge | Ram 2500 Truck | Dodge Ram 2500 Truck without Auxiliary Air Conditioning Blower Motor Resistor TRQ HCA40090 |
| 1994-2006 | Dodge | Ram 3500 Truck | Dodge Ram 3500 Truck Blower Motor Resistor TRQ HCA40090 |
| 2007-2009 | Dodge | Ram 3500 Truck | Dodge Ram 3500 Truck without Auxiliary Air Conditioning Blower Motor Resistor TRQ HCA40090 |
| 1993-1996 | Jeep | Grand Cherokee | Jeep Grand Cherokee Blower Motor Resistor TRQ HCA40090 |
| 1997-1999 | Jeep | Grand Cherokee | Jeep Grand Cherokee with Manual Climate Control Blower Motor Resistor TRQ HCA40090 |
| Brand Label | Part Number |
|---|---|
| Mopar | 4720278 |
| Airtex Engine Management | CR153 |
| TRQ | HCA40090 |
| Standard Ignition | RU-109 |
| Dorman - OE Solutions | 973-020 |
| Atlantic Auto Parts Inc | 430 RU-109 |
| Chrysler | 68004241AA |
| Chrysler | 4720278 |
This item may be interchangeable with parts from other brands with the above part numbers. This information is provided only for reference and does not guarantee that the item you are purchasing is identical to parts with part numbers from the brands listed above. To confirm that this item fits your vehicle, use the above "Check Vehicle Fit" option.
Lifetime Warranty
This item is backed by our limited lifetime warranty. In the event that this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.
Returns: Parts with electrical components cannot be returned once installed.
FREE Shipping is standard on Orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii, Alaska and US Territories. Shipping is not available to Canada.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii and US Territories as well as P.O. Boxes and APO/FPO/DPO addresses. Final shipping costs are available at checkout.
Created on:
Tools used
Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.
Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.
In this video, we're going to show you how to replace the blower motor resistor in this Dodge Ram. This one is a 2008, but this procedure is similar for 1994 to 2009 Dodge Rams. You'll need a new resistor from 1AAuto.com and a Phillips screwdriver.
Your blower motor resister is located under the dashboard on the passenger side, just below the glove box. We'll disconnect the electrical connector and remove these two number two Phillips head screws. Remove the resistor from the bottom of the HVAC box.
Here we have our old part that we removed from the vehicle and our new part from 1A Auto. As you can see, they're identical. We have this ceramic heat sync on the part of the resistor here. Same four pin connection at the bottom, as well as the same two bolt holes. You'll see that ours has become overheated. You can see that this ceramic is cracking. We actually have a good chunk of it that's come off here. This is a good sign that our resistor is getting too hot, possibly because of all this corrosion build up on the copper terminals at the bottom. If these go bad, it can cause operation of certain fan speeds or the fan to fail completely, so be sure to check out this resistor before you go and replace a fan.
Install the new blower motor resistor into the bottom of the HVAC box. Start your two Phillips head screws. Tighten them down with your number two Phillips head screwdriver. Reconnect your electrical connector.
Thanks for tuning in. We hope this video helped you out. Next time you need parts for your car, please visit 1AAuto.com. Also check out our other helpful how-to and diagnosis videos.
Tools used
Brought to you by 1AAuto.com. Your source for quality replacement parts and the best service on the internet. In this video, we're going to show you the location and how to replace your blower motor resistor. If your truck, the fan works, but maybe it doesn't work on certain fan settings like low or second, that's usually that your resistor's gone bad.
A pretty easy replacement. Just need a Phillips screwdriver. Your blower resistor, you can see it right here, along with two Phillips screws. It's pretty easy to access, although I'm going to film from right down here. Now first, there's a tab on the inside of the harness. Push the tab in and work that down. Then there are two screws. Original, new one from 1A Auto. You can see pretty much all the same. The connection is exactly the same. It's going to go in, both in, and function just like the original. Now install our new one up in there. Reconnect the lead. Turn the key on. Blow, two, three, four.
We hope this helps you out. Brought to you by www.1AAuto.com. Your source for quality replacement parts and the best service on the internet. Please feel free to call us toll free: 888-844-3393. We're the company that's here for you on the internet and in person.
HCA40090
Quality
The part fit perfectly and the supplied video from their website (app) made the repair quick and easy.
part woked as it should and arrived quickly
Works great! Thanks
Arrived on time and took 2 minutes to replace. Been a few weeks now, no issues.
This retirement part solved the malfunction in the blower and installed easily. It had been in for six months now and works like it should. The old one was visibly broken upon removal.
Product came in expected time , and was easy to install and worked as expected AC and myself are now all Chilling ??
Working like new
Honestly, I have very few words, but you guys Rock!! Thank ?? you for excellent, excellent service ?? ?? ?? ??! Timely delivery! And even an installation video.
Excellent! Looked and fit exactly like the original. The instructional video is how I found the part I needed in the first place. This made troubleshooting and installation a breeze and let me know that i only needed a resistor and not the entire blower and resistor kit. I did try to find the part locally just because I was already working on my truck that day but only found the wrong part locally and it cost significantly more mostly because it wasn't the right part. So I ordered it and it arrived on the date promised. I got it installed in a few minutes and yay, had air blowing out at low, medium, high levels instead of just blowing on low but sounding like it was on high. Very nice to have cold or warm air blowing when I need it! I was very pleased with the quality and excellent price of the part I needed. I will definitely use 1A Auto for future needs! The shipping was free with my purchase. Very great!
