battery keeps going dead

2003 LINCOLN NAVIGATOR
159,400 MILES • V8 • 4WD • AUTOMATIC
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CLAUD HOBSON
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I have had my altinator & battery checked which are fine but the battery still goes down every couple of days. I have pulled fuses to some of the controles like rear door ,air suspeninson system ,climate control seats, but it didnt stop.so I replaced them. I would appreciate your help thanks.
Sep 14, 2008 at 7:16 PM
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KASEKENNY
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You are on the right path, but we need to make sure this is how you tested the alternator.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

https://www.2carpros.com/articles/car-battery-load-test

If it is then we need to do a draw test but here is a guide that will help with this type of info:

https://www.2carpros.com/articles/car-battery-dead-overnight

However, if we want to test the system, we need to hook the meter in series with the negative battery and then see what the amperage is when the vehicle is completely off. Then we need to remove the fuses until the draw drops below 35 milliamps (.035 amps).

Please see the diagram below on how to set this up.

Let us know what you find. Thanks
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Feb 7, 2022 at 1:32 PM