I have installed my second rebuilt (3rd overall)alternator and am having problems with it. history- 1st alt. died without warning and I replaced it. 2nd alternator lasted about 2 weeks(at 14) and then gave symptoms-amp light and a couple others came on and charge dropped to nil. 3rd alternator showed 14 right away and then sporadically between 10.5-12, occaisonally 14. Now the amp light is bright while idling and dims when you accelerate. Grounds seem good. Any ideas?