Check the battery connections, then buy a digital voltmeter for about $20. That can tell you what's wrong. You'll also need a manual with your voltmeter to test the battery, alternator, R/R, fuses, and wiring. I don't know about you, but I would be pretty upset if I replaced the alternator and it still didn't work right.
Last edited by No Worries; 01-11-2008 at 12:46 AM.