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Dec 22, 2011 | 09:02 AM

05lariat4x4

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Need help

So I know on the older vehicles if you have the truck running and pull the battery connector off if it dies instantly your alternator is bad. Is that still true in today's trucks? (2005 f150 5.4)

Dec 22, 2011 | 11:23 AM

jbhill

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From: Newnan,GA

Yes. Why not go to the parts store and let them check it for free?

Dec 22, 2011 | 11:24 AM

jbhill

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From: Newnan,GA

Also, a volt meter to back of alternator checking to see if its putting out proper voltage works to.

Dec 22, 2011 | 12:15 PM

05lariat4x4

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Thanks. I'm going to autozone later to let them check it. But I tried that last night and it died instantly and my gauge cluster said check charging system

Dec 22, 2011 | 07:09 PM

jbhill

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From: Newnan,GA

more than likely an alternator.

Dec 22, 2011 | 08:35 PM

05lariat4x4

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It was. I'm taking it to get rebuilt on Monday. Thanks for the help

Dec 22, 2011 | 11:42 PM

Turkey Hunter

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From: virginia

This subject is questionable. Altho it does work as a way to test your altenator, it is possible to fry your PCM with the voltage spike when you hook it back up.

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