never had a generator problem with this truck... now the light came on several days ago... my wife uses the truck to get to work (1 mile away)
'don't have a repair manual, but have checked:
*the battery: 12.67 V - does not change voltage when the engine is revved
*fan belt for the generator: it's tight and it spins the gen.
*the voltage regulator: the bottom "coil" connects to the battery and then pushed in the GEN light goes out, but the voltage does NOT increase (at the battery) when the engine revs
...so, how do I check the VOLT.REG, and GEN to determine which is not working properly? Is there a way of "adjusting" the VOLT.REG.? I'm "in-the-dark" without "maintenance procedures" - I'm willing to fix it, I just don't know how...
I'd start by making sure that the regulator is grounded well. Take a lead from the battery and attach it to the body either close to or on the actual bolt that holds the regulator in place. If that doesn't fix it then you probably have a bad regulator, or bad brushes in the genny.
1996 F150 Regular cab, SWB, 4.9. 5speed.
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Could be the 'Brushes' need to be replaced, they do wear-out, don'tcha know.
Could be a Connection has come loose in the system somewhere.
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Most autoparts stores carry new brushes and bearings. The cost is about 20 bucks. As Col Flashman pointed out, the generator brushes are prolly worn down to nothing. When that happens, the generator will not charge.
Shade tree mechanic: The older voltage regulators do stick on occasion. Rap your knuckles on the cover a coupla times, see what happens.
Bill / Retired Ford Parts Manager / Part number research: 1928/2001 trucks & 1928/89 passenger cars.
2013 Escape FWD 2.0L Eco-Boost
Last edited by NumberDummy; 07-05-2007 at 04:11 AM.
'finally had a chance to remove both the volt.reg. and the generator.
after opening up the GEN 'noticed the brushes are worn pretty good but the commutator that they ride on is *R*E*A*L*L*Y* worn down...
'called *every* auto parts store in the phone book: nobody (on a Sunday) has a replacement. Tomorrow I'll start calling "auto electrical" places to see about getting another one...
Suggestions for places to try??
there was no fixing THIS commutator - it was worn down almost 40% !!! I don't know *how* it was working as long as it did... I've had my 61 'Connie since March 1984, rebuilt quite a few things along the way, but the last time I *looked* at the generator was ~1989 when I changed brushes... 'found an "automotive electric" place not too far from my shop and they completely rebuilt it in 1/2 a day !
'have had quite a few cars and motorcycles in this time, but the one "constant" was the '61.
My cousin's girlfriend, back in 1984, named the truck "Homer" - it was *not* good looking (faded paint, bad wheels/tires, etc) and she didn't want to be seen in it... the name 'stuck'...
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