battery light

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Dec 14, 2008 | 05:51 AM

trucker41

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battery light

battery light flashing once in awhile. Just flash on for like a half second then off. not do it again for awhile. Im thinking altenater getting ready to take a dump?

Dec 14, 2008 | 07:24 AM

Bustaduck

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mine did the same thing and came to find out it was the voltage regulator.Franklin battery replaced it for $40.00

Dec 14, 2008 | 10:37 AM

69cj

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From: Middle Tn.

The voltage regulator isn't built into the alternator?????

Dec 14, 2008 | 11:31 AM

phucker

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usually they just screw into the back and are sometimes easily changed on the truck, but yes the battery light comes on when the voltage drops to a certain point which usually means your alternator is on its way out. something else to check is to disconnect both batteries for about a half an hour then come back and check the voltage on both of them, and clean the posts. a dead or dying battery can also cause that light to come on by intermittantly shorting out the system.

Dec 14, 2008 | 12:01 PM

6LPSD

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check the batts under a load testing machine, check the alternatier by removing it and putting it on a output pesting machin if you are lucky o have one.

Dec 14, 2008 | 07:48 PM

trucker41

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I had the alternator tested at autozone. tested good but because it was a not happening all the time doesn't mean it isn't bad. Went ahead and bought a new one. Truck has almost 3000,000 miles on it. Orginal alternator so. Batts are brand new.

Dec 14, 2008 | 07:49 PM

rnolloth

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From: hamilton

My 6.0 doesnt have a external voltage regulator. I would address your problem now ive had to replace my alternator with no warning sign from the light.I had 2 new batteries shut the truck off while plowing to get fuel and would not restart.It was just barely charging.Dont get stuck out like i did.