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Re: Alternator not charging battery!!! Posted by Ari [Email] ![]() ![]() In Reply to: Alternator not charging battery!!!, Joonyerr, Tue, 30 May 2006 13:29:30 Members do not see ads below this line. - Help Keep This Site Online - Signup |
The battery light is doing what it should be doing - if the alternator isn't charging, the BAT light should be on. Here's a silly question - is the battery light tied to the proper place? There is a yellow or green wire, thin, that goes to the D+ terminal on the alternator. If it were instead tied to ground, then the light would be on all the time and the alternator wouldn't be working.
After that, a voltmeter is necessary. With the engine running, measure the voltage from the alternator body to ground. It should be less than 0.05 volts. If it's more than that, the ground is bad. Really. Then measure the D+ line to ground. It should be a volt or 2. If it's 0 volts (or very near), you may have a bad alternator. Yes, it's new. After that, make sure the belts are turning the alternator, that the cables are OK,etc.
posted by 12.42.121...
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