battery drain from the alternator? - Team Camaro Tech
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post #1 of 8 (permalink) Old Sep 26th, 04, 04:37 AM Thread Starter
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I traced a battery drain to the red wire going into the voltage regulator that turns orange going on its way to the voltage regulator (when I disconnect it, it brings the amps from 2.5 to 0.). Given this, does anyone know where my problems would be? alternator? voltage regulator? both are fairly new so I am puzzled.
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post #2 of 8 (permalink) Old Sep 26th, 04, 04:38 AM Thread Starter
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this is the red wire going from the alternator
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post #3 of 8 (permalink) Old Sep 26th, 04, 07:10 AM
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The alternator has a "diode tree" made of 9 diodes to rectify the AC field created by the alternator's windings. If one of the diodes gets leaky it will drain the battery. Depending on your alternator, you may be able to locate and test the diode tree. It is a little black chip about 3/4" X 1/4" with four legs oriented in a modified Y configuration. An auto parts store should be able to set your alternator up on a test bench and tell you for sure if the diodes are good if you don't want to tear into it yourself.

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post #4 of 8 (permalink) Old Sep 26th, 04, 10:33 AM Thread Starter
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tested the alternator at Autozone and they said it was fine.
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post #5 of 8 (permalink) Old Sep 26th, 04, 12:08 PM Thread Starter
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going nuts. i connect the red wire to the alternator- drain. i remove it, no drain?
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post #6 of 8 (permalink) Old Sep 26th, 04, 07:14 PM
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could auto zone be wrong? My alt. rebuilder found bad diodes AFTER his first test showed it was ok. He always does a more complete check after the first 'bench, belt check'.
Id have it checked by someone that rebuilds them.

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post #7 of 8 (permalink) Old Sep 27th, 04, 02:15 AM
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The only problem with Advance & AUtoZone machines, they don't have battery hook up to show the current draw when not running.
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post #8 of 8 (permalink) Old Sep 28th, 04, 07:16 AM Thread Starter
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Autozone was wrong. Replaced the Alternator and it fixed the problem.
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