A/C Blower Motor Not Working
JK Newbie
Joined: Oct 2019
Posts: 2
Likes: 0
From: Coconut Creek, FL
@Spoonduke714
Thanks for this tip. This just happened to me. I will check this before buying any parts.
Thanks for this tip. This just happened to me. I will check this before buying any parts.
JK Newbie
Joined: Mar 2018
Posts: 14
Likes: 0
From: brisbane
A/C Blower Motor Not Working
You're on the right track. The power to the blower motor is switched on the neutral (ground) side by the dash control unit. It's not difficult to change and cheaper than going to the stealership. The other thing involved is, as another reader has mentioned, is the request over can bus.
This implicates the PCM and the price goes up. As the other reader points out, the stealer ship can probably read this.
Good luck.
This implicates the PCM and the price goes up. As the other reader points out, the stealer ship can probably read this.
Good luck.
JK Newbie
Joined: Jul 2023
Posts: 1
Likes: 0
From: Boston, MA
My HVAC blower motor completely stopped working on my 2008 JK X. This begin a couple of weeks ago out of the blue. I've been trying to repair this for the past week. With help from this forum I've replaced the blower motor, resistor, and relay, but the motor still does not operate.
Below is a list of things I've tried:
- I've ran 12V directly to the blower motor and the motor runs.
- I've confirmed with a voltmeter that the blower motor receives 12V from the plug when the fan switch is on. When the fan switch is off the plug yields zero volts. (Puzzling tho that the voltage does not change at the plug whether the switch setting is on low or high.)
- I have reset the system by disconnecting the battery for ten minutes.
- I have wiggled every wire I can think of with the system on at the time.
- At one point I had replaced the blower motor but not the relay or resistor. I went to the auto parts store. They handed me a new relay. I plugged it in and turned the key. The blower worked in all settings. I thought it was repaired so I went back in the store and paid for the relay. I went back out to the car and the blower has not worked since. That's when I ordered a new resistor and replaced it.
Any ideas? How do I check the blower switch?
Thanks in advance.
Below is a list of things I've tried:
- I've ran 12V directly to the blower motor and the motor runs.
- I've confirmed with a voltmeter that the blower motor receives 12V from the plug when the fan switch is on. When the fan switch is off the plug yields zero volts. (Puzzling tho that the voltage does not change at the plug whether the switch setting is on low or high.)
- I have reset the system by disconnecting the battery for ten minutes.
- I have wiggled every wire I can think of with the system on at the time.
- At one point I had replaced the blower motor but not the relay or resistor. I went to the auto parts store. They handed me a new relay. I plugged it in and turned the key. The blower worked in all settings. I thought it was repaired so I went back in the store and paid for the relay. I went back out to the car and the blower has not worked since. That's when I ordered a new resistor and replaced it.
Any ideas? How do I check the blower switch?
Thanks in advance.