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frankie591 · 11-11-2012, 10:23 PM

open your sunroof and pour some water down the back drain and see if it leaks into the battery tray. Could also be a leaky taillight gasket, or there is a grommet above the battery tray where your sidemarker light wire exits the car.

11-11-2012, 10:23 PM	#6
frankie591 2nd Gear Member Join Date: Jun 2011 Location: Waterloo Posts: 261 Car: 87 325is	open your sunroof and pour some water down the back drain and see if it leaks into the battery tray. Could also be a leaky taillight gasket, or there is a grommet above the battery tray where your sidemarker light wire exits the car.