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High speed fan control disconnects every five to ten seconds?

Tiny
RYDGOMEZ2
  • MEMBER
  • 2014 DODGE GRAND CARAVAN
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 230,000 MILES
The relay is new. I did an evac and recharge of my A/C system, so it’s fully charged. When I attach a 30-amp fuse to bypass the relay fan runs fine and does not blow fuse. When I reattached, the relay is latching and unlocking every 5 to 10 seconds nonstop causing my A/C system not to cool properly. What I want to know is what is commanding my relay to unlatch. Where would I look to next?
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Sunday, August 6th, 2023 AT 2:36 PM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
I have seen the A/C compressor clutch coil short out and cause this problem, to confirm let's try unplugging the compressor to see if the fan operation returns. Also, I have seen the TIPM go out and cause this issue as well. To be sure we should do a CAN scan, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is how to change out the TIPM in case you need it. The TIPM is easy to replace because it-self learns. Check out the images (below). Please let us know what happens.
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Monday, August 7th, 2023 AT 12:35 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Anything?
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Monday, May 6th, 2024 AT 12:34 PM

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