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1988 Ford F-150 Repair Question


Topics covered: Battery, 12 volt, Alternator.
Mileage: 94 miles.

Asked on March 21, 2013

Ford F-150 Battery Problem

Has new alternator but battery will still not charge
Avatar Asked by (pending member)

Answer

Replied on March 21, 2013

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?

Tiny Answered by caradiodoc (expert)
17,274 answers provided