P2504 Code - Voltage Regulator? Alternator? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 6 Old 11-20-2013, 10:13 AM Thread Starter
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P2504 Code - Voltage Regulator? Alternator?

Jeep has been getting the battery indicator light intermitently when driving. It happens at random times, regardless of weather and temp, but seems to be getting worse since it has gotten into the negatives here...

Long story short, ran codes and got P2504 - Charging system high output.
I'm thinking alternator/voltage regulator. I read on another site that the JK has the regulator on the PCM and not internal to the alternator (WTF? ) - can anyone comfirm this?

Also, my radio cancels out from time to time when driving. Usually it's when the engine is at low RPM and under load as I'm starting out in 1st. Wondering if this could also be caused by my code?

Thanks!

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post #2 of 6 Old 11-20-2013, 01:07 PM
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I had a problem with alternator as it was obvious. Bearing noise and low voltage. No codes though. I have heard but cannot confirm that the regulator is part of the PCM. I would guess if your over charging than it is regulator and if that is the case your looking at the PCM possibly.

Can anyone out there confirm that the regulator is part of the PCM or not?

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post #3 of 6 Old 11-21-2013, 07:00 AM
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Yes the JK voltage regulator is integrated into the PCM.
Check all ground connections, poor ground connections can cause issues like this.


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post #4 of 6 Old 11-21-2013, 07:13 AM
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sounds like a battery. the alt is maxed out trying to maintane voltage levels

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post #5 of 6 Old 11-23-2013, 08:18 AM Thread Starter
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Quote:
Originally Posted by Panamon Creel View Post
Yes the JK voltage regulator is integrated into the PCM.
Check all ground connections, poor ground connections can cause issues like this.
Awesome, I'll check into that. I have it at the stealership right now... didnt really have a choice, bc I dont have the time to figure it out and needed it fixed for winter.

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post #6 of 6 Old 11-23-2013, 09:47 AM
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Seen that code before, it was due to loose battery terminals.
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