1988 Ford Bronco alternotor not charging correctly

Tiny
FAREMRTEDD
  • MEMBER
  • 1988 FORD BRONCO
  • V8
  • 4WD
  • AUTOMATIC
  • 78,785 MILES
I have an '88 fullsize bronco with a 302 and latley have noticed the voltmeter on the gage cluster is low when I stop in gear. The battery light also comes on for a moment. When I take off the volt gage pegs at 18! I checked with a meter and got 13 volts at idle and 17.5 at 2500rpm. I put in a new battery and a voltage regulator and now only get 12.2 volts at idle and at 2500tpm with a meter? After I turn off the engine the volts go back up to 12.5? I will take the alt. Down and get it tested, that is all that is left right? The parts store only had one voltage reg. In stock! I will try another one of those also!
Saturday, August 28th, 2010 AT 5:46 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi faremrtedd, Welcome to 2carpros and TY for the donation

Dunno if its external or internal regulator-but if you jumper A to F this will bypass the regulator and will increase the voltage 1/2-2 volts if not its coming from the alternator itself
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Saturday, August 28th, 2010 AT 6:35 PM

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