car runs great, I had to replace the ALT because it was on charging 7-11 volts. Now it charges 14, but Still, "once in awhile" the VOLT LIGHT comes on, it's still reading 14 volts, but the light will come on for awhile, go off, come back on. What's up with that ? Thanks
The hot side of the batt bulb is on with key on and the alternator is supposed to ground it turning the light on. If that wire grounds, the light can come on. The SA series alternators used the windings to ground that circuit. If alternator is not producing anything the windings are at ground potential. If they are, they are at positive potential, killing feed to bulb. On those, if the diodes were bad, the bulb would appear dim. But really turning on and off fast. On later alternators, the indicator is handled through the regulator and sent to the bulb or BCM.
3 choices. Alternator spinning too slow(belt?). Problem with the regulator. Or grounding indicator wire.
New Belt, no more "Birds" ! Funny, the old belt, not too old, "Dayco" was still soft, no cracks or worn spots, just Noisey. Now I can actually Hear my new engine ! (the only thing that wasn't brand new), I figured "why fix what ain't broken". That'll teach me. LOL