Subject	Could be a bad diode in the alternator
Posted by	wb3ztt on January 29, 2011 at 6:16 PM
	This message has been viewed 297 times.
In Reply To	over night battery uncharged posted by Serg300zx on January 28, 2011 at 08:15 PM
Message	A couple of years back my z had this problem. It turned out that my alternator had a bad diode which would constantly drain like 40 or 50 milliamps (don't really remember but it was out of specs) from the battery with the key off. The diode is a electrically one way check valve that allow current to flow from the alt. to the batt.and not the other way, killing the batt. The alt. has several.
Follow Ups	over night battery uncharged - Serg300zx 20:15:09 01/28/11 That tiny led is not killing your battery overnight. (n/m) - Black95 02:59:48 01/29/11 by any chance do you know why the led is on? - Serg300zx 14:49:32 01/29/11 you have an open circuit somewhere... - TeddyZ(SFC) 07:01:05 01/29/11 u think .... - Serg300zx 14:51:21 01/29/11 possibly... if it's wired wrong... - TeddyZ(SFC) 17:13:34 01/29/11 A bad alty can cause this issue to - easiest way to find - jzack 11:04:29 01/29/11 Dont think its the alternator,I just replaced it. - Serg300zx 14:48:34 01/29/11 This really is relatively easy to troubleshoot and it - jzack 16:00:36 01/29/11 Doesn't mean it isn't faulty. - CoHPhasor 18:13:39 01/29/11 Could be a bad diode in the alternator - wb3ztt 18:16:18 01/29/11 how can u test the diode in the alt? - Serg300zx 22:56:25 01/29/11 Re: how can u test the diode in the alt? - -Grimm- 15:42:51 01/30/11 Re: over night battery uncharged - boosted4life 23:05:07 01/29/11 How long does it take to drain your battery assuming... - evan_aggie 08:48:37 01/30/11 Good point about the security system flashing yellow - jzack 10:25:29 01/30/11 Use a multimeter to test the current being drawn - -Grimm- 13:26:59 01/31/11
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