Quote:
Originally Posted by bcredliner
BMW electronics are very sensitive to voltage changes, you can get a variety of error messages that are misleading.
For that reason and because it is easy to do and should be free, I would take both batteries back to the store you bought the new one and have them load tested. Even if the battery takes a charge that does not mean it is good.
If the charged battery will start your X then I would read the alternator voltage output from the OBC by unlocking the cluster. Regardless of the result I would still have the battery(s) load tested.
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I charged up the new (Duralast) battery all night and it didnt do anything. Only thing you hear is the relays in the truck clicking.
I am charging the BMW battery that was in the truck and see what happens. After that I will proceed to other test.
But I wanted to point out that I AM NOT hearing any noise from the fuel pump. It does not make any noise.