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  #1  
Old 04-16-2019, 05:58 PM
TheBeaver TheBeaver is offline
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Join Date: Apr 2019
Posts: 1
Default Error Code 539

I have a 1992 Ford Ranger 2wd Automatic 4.0L v6


My clutch for the AC keeps turning on and off even when the AC isn't on.
I also have a check engine light on and I was able to get the code 539 from it a "System shows voltage at PCM pin 10 Is A/C on"
The check engine light goes off if I accelerate, but when I let off the gas the check engine light comes back on.
I tried looking this problem up but can't seem to find a clear answer. Any Ideals what's going on?


The AC has been upgraded to 134a
Its not low on refrigerant
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Old 04-16-2019, 06:21 PM
e.fisher26 e.fisher26 is offline
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Join Date: Aug 2018
Posts: 121
Default Re: Error Code 539

Here’s a technical explanation, so basically Theres a short going to the a/c clutch or the PCM is bad


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2004 ranger 4.0L edge
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