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stevedak
Dodge Dakota
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8/06/2009
12:33:36
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 Subject: voltage regulation
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Message:
I have 2002 dakota with 4.7L auto. While driving at highway speeds, my volt meter on the dash went all the way to the high side, the check gauge light came on. I was in the middle of no where at midnight so I kept driving. The headlights were flickering constantly. Once off the highway, the volt meter returned to normal. When I got home, turned off the truck and it would not restart. Next day, I took the alternater for testing, it was good. The parts counter guy says the voltage regulation is done by the ECM. Can anyone confirm this? Is there a way to test or verify I have an ECM problem. Could it still be an alternator problem??
Thanks in advance for any help.
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daddio
Dodge Dakota
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8/06/2009
12:56:06
| RE: voltage regulation
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Message:
I am not sure how to test it but, the voltage regulator is built in to the PCM.
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JasonB
Dodge Dakota
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8/08/2009
23:52:58
| RE: voltage regulation
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Message:
True story.
The PCM does it all, based on electrical needs and battery temp. The battery temp sensor is under the battery.
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stevedak
Dodge Dakota
JOIN HERE
8/10/2009
13:56:58
| RE: voltage regulation
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Message:
Thanks for the response. can a bad battery temp sensor cause it to overcharge? I've continued to drive the truck with no repeat of the problem.
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carl2579
Dodge Dakota
JOIN HERE
9/29/2009
19:44:36
| RE: voltage regulation
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Message:
So was the problem your batt. temp. sensor. I also have a 2002 with the same problem, except mine has not gotten better.
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stevedak
Dodge Dakota
JOIN HERE
9/30/2009
21:34:19
| RE: voltage regulation
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Message:
My problem happended two months and has not happened since. I didn't do anything to correct it, it just hasn't failed again.
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