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    Bmw 316i 2001 - Battery light on # Archived Message

    Posted by Luke Browne on September 10, 2009, 12:10 pm

    Came in for drive belt replacement and I noticed the battery light was on, customer had said nothing of this problem so I assumed the battery had not yet gone flat? Checked the charge rate and it was an adequate 14.7 v looked up pin data on autodata and found the blue signal wire terminal designation, C13. It stated that it should show 1 volt with ignition on ( I assume for circuit integrity test?) which it did and 11-14 v when idling which it didn't? It continued to show 0.99 v am I looking at a bad alternator or have I missed a test?

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