OK, it is night and I turn on the old Gal. The GEN comes on and, as the car idles back, it dims out. I rev up, the GEN becomes brighter. I let off the gas, it dims. Isn't that ass-backwards? I was expecting it be the other way around.
Sounds like there is a wire crossed somewhere. Like on the regulator or something. But it could be that it's getting brighter because it is charging less at higher RPMs. Have you put a multimeter or something to check how much it's charging at low and high RPMs?
Either that or wiggle the wiring harness around near where it goes to the generator and see if you might have a bad connection so that more RPM there is more current to actually make it bright.
Agreed, sounds like it could be the reg.
If it's one of the old style, take the cover off, and see what the contacts are doing when it's running.
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<font size=-1>[ This Message was edited by: danv on 9/7/06 8:03pm ]</font>
You are on a roll now, you know the mechanic's secret tool.
If you still have points and all then you still have the "old style" voltage regulator and not one built in or attached to an alternator or I think for electronic ignition there is a dif regulator. Not positive on that as I still have old style everything under the hood except the colors.
No parts stores around? Now that's real isolation! 20 miles to our closest.
I don't remember ever trying it but couldn't a person maybe file those little contacts in the regulator? They remind me of points. When my reg went it was that resistor or whatever it's called wire that's under it with the fiberous like casing. It fried or broke in half.
Didn't have any indications recent anyway to tell me it was going but there was a time a couple years ago that tapping on it with a hammer "fixed" it. After the new one was in though wow what a difference in my headlights. That thing had probably been going out for years.
That's right, forgot you had already changed that. Sometimes they can go bad in a short time. Maybe remove it and see that none of the contacts are stuck? I seem to get stuck changing water pumps every 2 yrs and starters about the same. So who knows on the regulators. I'd try moving some wires around and see if it goes out. I had that problem a couple years ago. After a different generator and already had the new reg that was only a couple months old the light would still come on sometimes. Ended up being a bad connection on one of the wires that caused it to come on til i hit the right bump in the road.