Alt/voltage regulator ?
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More Turbo
Joined: Feb 2004
Posts: 572
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From: Spring Hill, TN
Alt/voltage regulator ?
My truck battery is not recharging. The volt meter gauge drops slowly after I get it running. Headlights get dim. Battery is new,but will get it checked.There is a magnetic pull on the back of the alt (maybe that's a old tale). If I replace the alternator,which one should I get 50,60,70,or 100 amps. Truck is 79 F-150 4x4 400 V-8 ,C-6 came with ps,pb,a/c,cruise.Could it be the voltage regulator ? Should the voltage regulator be matching to the alt ? Is there an after market upgrade that I could do.I am in the local VFD,so I do plan on adding lights and sirens at some point.Just trying to do this once. Thanks for your help.
Junior User
Joined: May 2009
Posts: 71
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its possible that the voltage regulator could be bad... although in the different dentsides i've owned over the years have never seen one go bad... i would pull the alt and have it checked. not quite sure on the amperage that lights and sirens pull but i would think a 70 amp alt should be effiecent.... dont know what u mean by voltage reg matching to the alt.... but i dont believe the voltage reg measures amps just volts.
