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A/C clutch fuse keeps burning out

Tiny
DAMSON2021
  • MEMBER
  • 2013 CADILLAC ATS
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
What could be the problem? I put 10-amp 15 amp and 25 amp the only one that didn’t blow is 25 amp, but clutch not engaging?
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Sunday, June 19th, 2022 AT 4:56 PM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
This happens when the A/C compressor coil is shorted out, which is a common repair on all cars. I would get a new compressor from Amazon (AC Delco unit). here are generic guides to help you do the job with specific instructions in the diagrams below for your car:

https://www.2carpros.com/articles/replace-air-conditioner-compressor

and

https://youtu.be/4EqdrBVb0sY

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Monday, June 20th, 2022 AT 12:39 PM (Merged)
Tiny
DAMSON2021
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  • 6 POSTS
I change the compressor but for some reason it is still doing same thing, blowing the clutch fuse?
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Monday, June 27th, 2022 AT 8:46 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
There is only one wire (brn-grn) from the compressor clutch and the relay, it could be the relay is shorted out because of the bad compressor. here is a guide to help check it and the location of the relay #62:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what happens.
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Monday, June 27th, 2022 AT 9:05 AM
Tiny
DAMSON2021
  • MEMBER
  • 6 POSTS
So, you're saying my A/C relay needs to be replaced, and that could be causing my A/C clutch fuse to burn out?
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Monday, June 27th, 2022 AT 9:26 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
It is either the relay or the wiring going to the compressor. here is the wiring diagrams so you can see how the system works brown/green wire go to the compressor from the relay you can test the connection and a short to ground using this guide:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what happens.
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Tuesday, June 28th, 2022 AT 10:54 AM
Tiny
DAMSON2021
  • MEMBER
  • 6 POSTS
I swapped out the relay it’s still blowing 10am fuse for the A/C clutch.
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Wednesday, June 29th, 2022 AT 9:41 AM
Tiny
KEN L
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The only thing left is the wiring, it must be pinched or rubbed through. Please use the guide and wiring diagrams to test the brown/green wire, make sure it is not shorting to ground.
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Wednesday, June 29th, 2022 AT 10:47 AM
Tiny
DAMSON2021
  • MEMBER
  • 6 POSTS
I had to run a wire to compressor to battery to over pass it but it’s working that way. Thank you so much for advice and help. I highly appreciate it.
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Wednesday, June 29th, 2022 AT 5:36 PM
Tiny
KEN L
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Yep, the wire must have been shorted, Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.
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Thursday, June 30th, 2022 AT 8:21 PM

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