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1998 Ford F-150 battery/alternator/voltage regulator

Tiny
CHERFHARRYO
  • MEMBER
  • 1998 FORD F-150
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
My check battery light has come on, my battert tests at 12.5 when engine is off, but when I start it the voltage goes done to 10 volts. I took the alternator to the shop to bench tested and they said it is fine. Could it be the voltage regulator (the box on the fire wall)
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Sunday, April 13th, 2008 AT 12:25 PM

1 Reply

Tiny
FLEXY5
  • MECHANIC
  • 512 POSTS
I'm not sure which box you are refering to. Can you take a picture and post it. The main computer should be the voltage regulator. Post the picture and we'll go from there.
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Sunday, April 13th, 2008 AT 10:40 PM

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