Join Date: Jun 2007
Location: Leiston, Suffolk, UK
Re: Not Charging, please help
[QUOTE=ally;1903600]Spot on. Even with it blown, if you exceed 3000rpm, the alternator windings will self excite and the alternator will charge from then on. Like David C says, charge you battery first. BTW, a charged battery should hold 12.5volts, and the alternator should ideally charge 14-14.5 volts without any current draw.
That's a bang on quote about the bulb blown. The bulb does give a supply to the AVR however there's enough residual magnatism in the rotor to get it to self excite supplying enough power to the AVR which then provides a bit more excitation and your off.
I did wonder if it was a dud cell in the battery, specificaly the one with charge sensor on it, and maybe it had gone high resistance but then it wouldn't start. When on charge the terminal voltage is 15v, when disconected it's 12.5 and the car starts fine.
It's got to be the damn alternator. Has anyone successfully removed the AVR and diode pack without taking the thing out of the car, I'm thinking this is going to be the easiest option.