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Old 15-09-2016, 07:27 PM
Charlieboy Charlieboy is offline
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Join Date: Aug 2016
Location: Overton
Posts: 6
Default Re: Bmw n54 12v pre-crank help

Hi Richard, finally had a bit of time today to see if I can get power to the unit before starting the engine and unfortunately 3 hours later I got no where with it.
I tried jacking into a few of the fuses but the unit won't power up on pre crack. It only powers up when the engine is started. Is it essential that the unit powers up first before the engine?

These are the steps when I start the car.

1 key card goes in and the dash light up
2 press the start button without touching the break pedal and rest of the electrics start.
3 press the start button with the break pedal down then engine starts.

I do have comfort access on my car if that makes any difference.

I managed to find a fuse that turns it on when the key isn't even in and stay on but as soon as you put the key in it turns off and won't turn back on until the engine has started.
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