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      11-20-2012, 07:58 PM   #3
Second Lieutenant

Drives: 318i
Join Date: Mar 2012
Location: Singapore

Posts: 213
iTrader: (0)

there is a grounding point next to the fusebox in the passenger side footwell.
as for 12V supply which is constantly on, it may be better to use a multimeter to check which fuse is always on when engine is turned off and then use a fuse tap to hook up to this fuse.