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Won't run without battery connected... Won't run without battery connected...
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Old 12-07-2015, 10:06 AM
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You DO NOT disconnect the battery while the engine is running on modern vehicles. You can cause a LOT of problems.

Get a Voltmeter or use the Hidden OBC Menu to verify the running Voltage.

Also keep in mind the E70 and probably other similar platforms have a VERY POOR method to notify the driver there is a charging problem. I really do not think the E70 can notify the driver!!

http://www.scoopz.com/m5board/E60_Hi...structions.pdf

I run a wire UltraGauge on my X5 with threshold alarms for Temperature and Voltage.

UltraGauge OBDII Scan tool & Information Center

Low Voltage an any modern vehicle will cause ALL sorts of crazy problems.
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