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      12-12-2013, 05:16 PM   #36
Efthreeoh
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Drives: The E90 + Z4 Coupe & Z3 R'ster
Join Date: May 2012
Location: Virginia

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Quote:
Originally Posted by Andy328i View Post
I am guessing the only thing "on" would be the fan (blowing the residual heat from the motor). For the short time you use it, I can't see it draining too much from the battery.
It runs the blower and water pump. But it will shut off if the battery gets too low, or if the water temperature drops off heat.
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