1988 Ford F-150 alternator

Tiny
BCOCKERHAM
  • MEMBER
  • 1988 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
I have installed a new battery as well as a new alternator but running the truck still drains the battery and the battery light is still on. I even replaced both plugs to the alternator. On the bench test it says alternator is good but installed in the truck it reads bad. I'm at a lose please advise
Tuesday, May 5th, 2009 AT 2:45 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
On the fender right next to the battery, follow the positive cable to the starter solenoid, the smaller wires are fusible links, test them with a test light, replace the ones that dont light the light before and after the FUSE bump. If all test OK check/ replace the battery cables.
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Tuesday, May 5th, 2009 AT 3:06 PM

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