Menu

1A Auto Video Library
Our how-to videos have helped repair over 100 million vehicles

How To Replace Heater Fan Speed Resistor 03-10 Cadillac CTS

Share on:
  1. step : Removing the Fan Speed Resistor (0:29)
    • Remove the two 7mm bolts underneath the glove box
    • Remove the two Phillips screws underneath the glove box
    • Pull down the trim piece to access the blower motor
    • Disconnect the blower motor wiring harness
    • Remove the Phillips screw from the resistor
    • Remove the resistor
  2. step : Installing the Fan Speed Resistor (1:55)
    • Insert the resistor into place
    • Tighten the screw to the resistor
    • Connect the blower motor wiring harness
    • Push the trim piece into place
    • Tighten the two Phillips screws underneath the glove box
    • Tighten the two 7mm bolts underneath the glove box

Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Don from 1A Auto. I hope this how-to video helps you out, and the next time you need a part for your vehicle, think of 1aauto.com. Thanks.

In this video, we're going to show you how to replace the blower motor resistor on this 2006 Cadillac CTS. It's the same part and similar process on the CTS from 2003 to 2010. The items you'll need for this is new blower motor resistor from 1AAuto.com and a 7 millimeter socket and ratchet and a Phillips screwdriver.

Underneath your glove box are two 7mm bolts. We'll fast-forward as we do that. Now, near the front of the trim piece there's two Phillips screws. Go ahead and remove those. Once that's completed, pull down on the trim piece to access the blower motor.

To remove the resistor, push the tab on the bottom of this harness and then just pull it free. Holding the blower motor resistor is a small Phillips screw. Remove that. Once you remove the screws, it pulls right out.

Reinstall is just a reverse of the procedure. Feed your blower motor resistor back into place. Then, tighten that small Phillips screw by hand and reconnect the wiring harness. Push the trim piece back up into place. To resecure it, tighten those two Phillips screws and the two 7mm bolts. Be careful not to over-tighten them. You don't want to strip out the plastic.

We hope this video helps you out. Brought to you by 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.

Tools needed for replacement:

    Ratchets & Related

  • Ratchet

  • Screwdrivers & Related

  • Phillips Head Screwdriver

  • Sockets - Metric

  • 7mm Socket


Search Videos
Go To Top


Same Day Shipping

Orders ship same day when ordered by 2pm ET. Need your part faster? Choose expedited shipping at checkout.


Guaranteed To Fit

Providing you the highest quality, direct fit replacement auto parts enforced to the strictest product standards.


USA Customer Support

Exceeding customers' expectations every day, our team of passionate auto enthusiasts are here to help.


Instructional Video Library

Thousands of how-to auto repair videos specific to year, make and model guide you step-by-step through your repair.

Loading...