Question about 1981 Ford F 100
I have a 1977 ford f100 4wd with a 351 cleveland v8. the alternator is only giving out 13volts with the system under no load, 12-12.5 with lights and accesories on. at most it will give 40 amps but usually only about 35. auto elec has looked oner alternator 3 times and says is fine. what am i overlooking? the wiring seems original but otherwise servicable
It has a sperate voltage regulator on the right hand inner fender about 4 by 4 and 2 inches thik you need a new one Make SURE you ground the new one before connecting or you will ruin it
Posted on Dec 10, 2008
Run a jumper from your alternator to your battery. This is a temporary fix and should stabilize the voltage and charge the system. It seems there is a short or grounding problem somewhere between the alternator and battery, so you will need follow the wiring but given the age of the vehicle, you should change the wiring from your generator or alternator to your battery. Be sure when you are running a jumper, your gauge wire is heavy enough and make sure the wire isn't hot. This is a temporary fix so don't go on a long road trip.
Posted on Dec 06, 2008
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Posted on Jan 02, 2017
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