Battery light issue - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 03-04-2014, 10:46 AM Thread Starter
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Battery light issue

This seems backwards to me, but my battery light comes during excelleration. Then turns off while coasting.

I replaced the alternator in sept. and both batteries in January. And this past weekend I replaced the steering gear box.

I have driven the truck for two days since completing the gear box swap. And didn't notice the idiot light going on and off.

The battery voltage gauge looks steady. And my lights seam ok.

I'm stumped.

Any ideas?
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post #2 of 8 Old 03-04-2014, 11:58 AM
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just a long shot to bump this... hows the tensioner? Is the belt getting loose when you rev it up?

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post #3 of 8 Old 03-04-2014, 03:55 PM Thread Starter
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I should be able to hear the squeal?
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post #4 of 8 Old 03-04-2014, 07:16 PM
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coud be sending too much voltage? my moms car had a similair problem, under acceleration it would put out like 17-18 volts and trigger a battery light

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post #5 of 8 Old 03-04-2014, 07:54 PM
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Intermittent battery lights usually indicate bad voltage regulators.

Unfortunately, the voltage regulator is part of the alternator...

Who's alternator did you get?

If it's like AutoZone or O'rilleys, that's your problem right there.

Their alternators are crap.

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post #6 of 8 Old 03-05-2014, 04:19 PM Thread Starter
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It's oreily's.

So what your saying is I need to run a ton of gadgets. To draw the voltage down. Lol


Oreily's should be able to swap it right out? Do u think my batteries r going to be negatively affected?
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post #7 of 8 Old 03-06-2014, 08:27 PM Thread Starter
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Thanks for the advice. It was the alternator voltage regulator.
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post #8 of 8 Old 03-06-2014, 08:30 PM
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O'Reilly alternators are ****. On my 3rd one in a year, but they come with a lifetime warranty so everytime i drop one, I walk in with it and they just go grab one off the shelf and give it to me without testing it cause they know me by name lol


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