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Old 07-25-2010, 09:57 PM
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ps2cho ps2cho is offline
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Join Date: Jun 2006
Location: Chandler, Arizona
Posts: 3,525
Bad Alternator or Headlight wiring issue?

New thread as I have figured out kinda what is causing my drain. Now just Why so I can know if I need to replace the alternator or not.
  • Battery has been load tested
  • 12.68v left overnight disconnected. It holds charge.
  • 9mA draw when off, so it is not draining when the car is off.
  • With NO accessories on, 13.98v running
  • With ALL accessories on (EXCLUDING HEADLIGHTS), 13.65v running
  • With NO accessories on, ONLY LIGHTS, 12.7v running.

Is this a bad alternator, or some kind of weird excessive draw in the lighting system? After a 15 minute drive the battery will be close to dead when I try to start it up again. I can drive during the day numerous times without an issue as the lights are not on, but as soon as I drive with them on, battery dead.

I have replaced the voltage regulator....

Funds are a little tight right now...otherwise I'd just replace the alternator so I want to make sure it IS the alternator before I do it.


Thanks
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