03-09-2014, 11:26 AM
If your battery is vaguely healthy, could you not just remove the alternator belt (and if needs be, disconnect the main positive feed from the alternator) and run the engine up to see if the noisy earth issue goes away?
If it does, it points at the alternator as you suspect, and if it doesn't, you know the issue is elsewhere and you've saved having to buy and fit a replacement alternator for no reason.
If it does, it points at the alternator as you suspect, and if it doesn't, you know the issue is elsewhere and you've saved having to buy and fit a replacement alternator for no reason.
1990 Peugeot 205 GTi 1.9 // 1991 Peugeot 205 GTi 1.9 16v // 1992 Peugeot 205 GTi 1.9 // 1999 Peugeot 306 HDi Estate