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Re: battery/charging problem (archive)

[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]

Posted by Phil Dupont on January 13, 2001 at 19:50:42:

In Reply to: Re: battery/charging problem posted by Glenn on January 13, 2001 at 00:06:27:

The process below will help you pinpoint what circuit the drain is coming from if you have a drain. Another possibilty, as I just ran in to with me E30 is the battery is failing. Mine will drain within a week if not driven. The alternato and voltage regulators check out fine and there are no drains on the system. Since last night, battery disconnected, the voltage on the battery has dropped from 12.65 down to 12.14. Just something else to think about. Take your battery to Autozone and they will test it for free. They also will test your alternator & regulator I believe.

Disconnect your negative battery cable and hook up a test lite in series (one end on the battery the other on the terminal) Make sure all accessories are turned off and doors are shut, and key in the off position. If the test light in on you have a battery drain problem. Simple open your fuse box and pull on fuse at a time until light goes out. then look and find what that fuse goes to. Usually power antenna is the problem but not all the time. E-mail me if you have any question. I try to help.

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