Quote:
Originally Posted by andrewwynn
I should mention that was with my new car e70. Still it should work I don't know why it didn't. I do have to set the jump pack to boost mode to supply power when battery is lower than 11v and thought i had.
I think the main battery positive is a pass through to the main supply at the back. I'm wondering if there's s disconnect at the positive battery terminal. I just remember being very surprised i couldn't figure out the logic at all.
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I've done it on my E70 also. No problem with a 25 A power supply. After starting the engine the vehicle would work with the supply from alternator even with disconnected battery. Jump start point, starter motor and alternator are all on the same cable from engine bay to trunk. The battery is there to able vehicle start and of course makes the voltage more stable.