How do I diagnose non-working blower. on 2000 BMW 323i

11/99 production date. It has a transistorized "blower output stage" not resistors. The blower has power but no ground.

by in Potwin, KS on October 31, 2013
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1 answer
ANSWER by , October 31, 2013
ground maybe comes thru bcm,ck for info