Has new alternator but battery will still not.

Tiny
ANONYMOUS
  • 1988 FORD F-150
  • 94 MILES

Has new alternator but battery will still not charge

Thursday, March 21st, 2013 AT 6:09 AM

1 Reply

Tiny
CARADIODOC
  • EXPERT
  • 27,978 POSTS

There's two generators available for your application. The older design uses an external voltage regulator with four wires in the plug. The newer design has a three-wire regulator bolted to the back of the generator. Which do you have?

If you have the newer design, check for the presence of 12 volts on one of the three plug-in wires, usually a yellow wire. If it's missing, look for a blown fuse, usually a 15 amp.

Does the "battery" warning light on the dash turn on when you turn on the ignition switch?

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Thursday, March 21st, 2013 AT 7:07 AM

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