battery indicator light flashing

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Dec 2, 2013 | 02:28 PM

VegiePower

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Cross-Country

Joined: Aug 2010

Posts: 53

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From: Canmore, Alberta, Canada

battery indicator light flashing

Hi folks. My battery indicator light is doing weird stuff. I have a secondary volt gauge that shows good voltage throughout. Checked posts and connections tight.

At idle the warning light is off. Under slow acceleration it starts to flash with the frequency increasing with greater acceleration until it finally goes solid with normal acceleration and highway speeds.

Any ideas?

Thanks

Dec 2, 2013 | 02:39 PM

Money-Pit

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Joined: Dec 2012

Posts: 2,169

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From: SW Florida

Quote:

Originally Posted by VegiePower

I have a secondary volt gauge that shows good voltage throughout.

What type of volt gauge is it and what volt reading are you getting?

Usually the light comes on when you have under, or over voltage. Based on your description of how it's acting, I'm going to guess the alternator is over charging. That's only a guess though....based on my experience with various vehicles and off road construction equipment.

Dec 2, 2013 | 04:17 PM

mgraveman

Elder User

Joined: Feb 2004

Posts: 898

Likes: 3

Quote:

Originally Posted by VegiePower

I saw this once before. It was an alternator where the commutator ring was worn through on part of it. At low speed the brush was able to keep contact enough to hold it on there. At high speed the ring was oval shaped and pushing the brush away enough that it couldn't keep good contact.

Pull the voltage regulator off the back and see if the brush is almost gone. If it is pull the alternator apart and see what the commutator ring looks like.