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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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k