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jwmarc jwmarc is offline
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Join Date: Nov 2005
Location: columbia md
Posts: 211
I believe they apply 12v to each device....I am not sure if it pulls currant directly from the battery or if it goes through the ECU.. ECU pulling engine temp and adjusting currant to each device as the car warms up. The wiring schematic would show you..

Sorry I just tried to up load some of the electrical schematic..had problems will try later.
1987 930 -Guards Red
2001 740I sport Blk
2011 F-150 supercrew Blk
2014 X3 2.8 white
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Old 11-04-2007, 08:14 AM
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