battery light stays on

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Mar 15, 2011 | 05:24 AM

81fordf-250

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From: Chrisney Indiana

battery light stays on

I have an 82 f150 that I just finished putting a 351w in. The battery light stays on but the alternator is charging. I did away with ford ignition module because I put in a hei conversion distributer. I have a feeling this is why its on but I don't know how to get the light to go off!

Mar 15, 2011 | 08:58 AM

Franklin2

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From: Virginia

How do you know it's charging? Have you measured the voltage at the battery with the truck running? If so, what is it? Most of these trucks have a gauge package. Do you have gauges?

Mar 15, 2011 | 03:17 PM

81fordf-250

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From: Chrisney Indiana

I haven't had a volt meter hooked to it but I toke the truck on a test drive even with the light on and the lights stayed bright and it still cranks right over so that makes me think it is charging. I was wondering if maybe the ignition box has anything to do with the initial starting of the charging system... a good wiring diagram would help a bunch

Mar 15, 2011 | 04:10 PM

Franklin2

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From: Virginia

Ignition has nothing to do with charging. Is this truck all original besides the engine? Do you have factory gauges. And you need to get a voltmeter and check the battery with the engine running.

Mar 16, 2011 | 11:22 AM

81fordf-250

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From: Chrisney Indiana

There has been a lot changed on this truck. Iv had this same problem before and it turned up being the regulator was bad. I have a meter but its at a friends house. I'm gonna get it tonight and do some more checking. I'm about ready to put a gm one wire alternator on it.

Mar 17, 2011 | 05:48 PM

81fordf-250

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From: Chrisney Indiana

Well I was right the alternator is working. Its running at 14.1 v at the battery but yet the light is still on.

Mar 17, 2011 | 07:13 PM

Franklin2

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From: Virginia

Since this has a light in the dash, I am assuming you do not have a gauge package from the factory? Ford wired the alternator two different ways, depending on if you have a cluster with gauges or not. It's very unusual for A f150 not to have gauges though, so I am trying to make sure what you have. Or maybe you don't know what you have if this truck is a hybrid, with the wrong cluster or the wrong wiring harness? That's why I am trying to get more info.