Battery Light - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 07-02-2009, 08:41 PM Thread Starter
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Battery Light

Came out of the movies tuesday night and when I started my truck and my battery light stayed on. i revved it up to about 1000 and it went out then came right back on when i let it idle again. Every time i drive it the RPMs have to be higher and higher before it will go out and always comes back on after it drops below that RPM. now the light wont even go out, it just flickers. (My girlfriend said it might be a bad bulb ) so WTF? amp gauge is reading normal, batt terminals are clean, and new batteries were put in before i bought it. Could my alternator be going out? I always thought alts just sh*t themselves all at once, not little by little. Its been starting fine and lights work like normal.

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post #2 of 8 Old 07-02-2009, 08:47 PM
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Might be your alt.

Mine's done that for 3 years after I replaced the ALT and batteries at Advanced Auto Parts. Still starts like normal other than winter. I'd look into getting a Straight-From-Ford ALT or a high amp alt and see if that fixes it.

OR....take your alt to Advanced/autozone and get it tested for free.


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post #3 of 8 Old 07-03-2009, 05:10 AM Thread Starter
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Ya, i might just have them test it. thanks ditty

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post #4 of 8 Old 07-03-2009, 06:17 AM
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they will flicker and come on and off when the alternator is starting to go.

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post #5 of 8 Old 07-03-2009, 07:08 AM
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Get the alternator bench tested at Autozone or Advanced Auto. Could be the regulator which would mean replacing the alt. Look at connections at the alternator first, tho.


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post #6 of 8 Old 07-04-2009, 02:21 PM Thread Starter
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Quote:
Originally Posted by nccatfan View Post
Get the alternator bench tested at Autozone or Advanced Auto. Could be the regulator which would mean replacing the alt. Look at connections at the alternator first, tho.
i did that too and they are tight, still need to get it tested but cant today

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post #7 of 8 Old 07-04-2009, 02:50 PM
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Yup sounds like your alt is going


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post #8 of 8 Old 07-04-2009, 04:54 PM
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pull the plug on top of your alt loose and see if the light goes out.If it does,then the internal regulator is shot.


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