A/C not working after a tool rolled down and contacted both battery posts

Tiny
CAR PROBLEM
  • MEMBER
  • 2008 HYUNDAI ACCENT
  • 1.6L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 88,300 MILES
Dear sirs, I had been working on my car changing the timing belt, water pump and belts. While finishing up and topping up water one of my tools rolled off the top of the motor and contacted both battery posts and shorted it for a split second. This where my problem lies I think? The A/C wouldn't come on.I checked the low pressure charge, it was too low, I charged it up.I checked the relay first, took cover off relay and found the contacts black and burnt. So I replaced it. Still nothing.I then checked power at fuse block. Power is there.I checked the condenser fan, it works but doesn't come on automatically. Controls in the cabin and fan motor work fine. The car will not blow cold air!The big question does the PCM of my car control any functions of my A/C system?Did it get damaged when I shorted the battery?The car except of A/C works just fine.I cannot fine an answer whether the PCM controls my A/C on the internet any where! Please help if you can. PS, your videos are the best on all of YouTube! Thank you so very much, Paul Taylor
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Thursday, June 11th, 2020 AT 6:35 AM

2 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

I attached a wiring diagram for you to view.

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

We need to do some testing at the clutch relay to see if you have the powers present for operation. You will need a test light or voltmeter for these tests.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

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

Roy
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Thursday, June 11th, 2020 AT 9:02 AM
Tiny
KEN
  • ADMIN
Here are the complete air conditioner wiring diagrams so you can see how the system works with the fuse location as well. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Thursday, June 11th, 2020 AT 5:12 PM

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