Battery Light Appears When I Accel.

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Mar 8, 2011 | 09:24 PM

justinmichael22

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Battery Light Appears When I Accel.

When I accelerate to around 3000 RPM's, my battery indicator light comes on until the gear shifts and the RPM's drop. The lights also dim when this happens. It didn't happen before. Would this be a bad battery or a bad alternator? Please help.

Justin

Mar 8, 2011 | 09:33 PM

fordmerc

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Sounds like a new alternator is in your future.

Mar 8, 2011 | 09:55 PM

justinmichael22

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Aw man. Just shuddered. Thanks for the input Fordmerc. I'll take your advice and do accordingly.

Mar 9, 2011 | 12:57 AM

wickedklown83

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From: Washington County, Penna

On my 02 f150 with the 4.2 it's been doing the same thing and it's been fine for 3 months so far... You should be safe as long as you can keep your foot out of the throttle

Mar 9, 2011 | 02:09 AM

gmoon

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what the belt look like,could be slipping

Mar 9, 2011 | 01:48 PM

Dave G.

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Sounds like you are running off just the battery, or, dirty cable ends are preventing full current recharge.

If it's not the battery terminals, most places will check the alternator for N/C.

I think I paid about $190.00 for a rebuilt one. There are a couple of different types to match up to.

Dave

Mar 9, 2011 | 11:15 PM

Lime1GT

Fleet Mechanic

Joined: Jul 2010

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From: Winnipeg

Might be the brushes in the alternator are so worn out the brush spring tension is too weak to make good contact at higher rpm on the slip rings. As stated above you may need a new alternator if the mileage is higher on it.