Lost Power

Kizelio · 01-14-2017, 07:34 AM

I lost all power to the car when very foolishly left the battery charger attached while trying to start it, especially since I had the charger set at 55 amps. Now I have no power anywhere except to the engine bay (the fan kept running while I had no power anywhere else). Now the key is stuck and still have no power after fully charging the battery. What are the chances I did something cheap, like blow a fuse on the battery's distribution box?

Efthreeoh · 01-14-2017, 09:52 AM

Try disconnecting both terminals at the battery and leave it sit un-powered for a 1/2 hour or so. You might have somehow triggered either the IBS (negative cable) or the BST (positive cable) to shut down power to the distribution box. Kinda like a computer reboot.

I'm just guessing here, but that's the first step I'd take.

Kizelio · 01-14-2017, 10:02 AM

Thanks, I'll try that first

Kizelio · 01-14-2017, 11:26 AM

I just disconnected both posts. The negative was easy, but I had to remove the distribution box to get the positive off.

Kizelio · 01-14-2017, 05:59 PM

No luck. Do you think the next step is to replace the distribution module?

01-14-2017, 07:34 AM	#1
Kizelio Enlisted Member 5 Rep 46 Posts Drives: 2007 328xi E90 Sedan Graphite Join Date: Jun 2011 Location: Minneapolis, MN, USA iTrader: (0)	Lost Power I lost all power to the car when very foolishly left the battery charger attached while trying to start it, especially since I had the charger set at 55 amps. Now I have no power anywhere except to the engine bay (the fan kept running while I had no power anywhere else). Now the key is stuck and still have no power after fully charging the battery. What are the chances I did something cheap, like blow a fuse on the battery's distribution box? Last edited by Kizelio; 01-15-2017 at 12:34 PM.. Reason: Not enough responses
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01-14-2017, 09:52 AM	#2
Efthreeoh General 19138 Rep 19,700 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	Try disconnecting both terminals at the battery and leave it sit un-powered for a 1/2 hour or so. You might have somehow triggered either the IBS (negative cable) or the BST (positive cable) to shut down power to the distribution box. Kinda like a computer reboot. I'm just guessing here, but that's the first step I'd take. __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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01-14-2017, 10:02 AM	#3
Kizelio Enlisted Member 5 Rep 46 Posts Drives: 2007 328xi E90 Sedan Graphite Join Date: Jun 2011 Location: Minneapolis, MN, USA iTrader: (0)	Thanks, I'll try that first
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01-14-2017, 11:26 AM	#4
Kizelio Enlisted Member 5 Rep 46 Posts Drives: 2007 328xi E90 Sedan Graphite Join Date: Jun 2011 Location: Minneapolis, MN, USA iTrader: (0)	I just disconnected both posts. The negative was easy, but I had to remove the distribution box to get the positive off.
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01-14-2017, 05:59 PM	#5
Kizelio Enlisted Member 5 Rep 46 Posts Drives: 2007 328xi E90 Sedan Graphite Join Date: Jun 2011 Location: Minneapolis, MN, USA iTrader: (0)	No luck. Do you think the next step is to replace the distribution module? Last edited by Kizelio; 01-15-2017 at 12:35 PM.. Reason: .
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