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Old 08-10-2012, 02:22 PM   #4
tomoyer
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Join Date: Aug 2011
Location: Reading, Pennsylvania
Posts: 782
My Ride: 03 325xi, 03 330xi
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First and easiest check, try all your keys and see if any of them work/don't work. If that is the case, you have a bad key. Next check, test the battery with a DMM, should have 12.5 or more volts if fully charged. You can remove the battery and have it load tested to make sure that it has the cold cranking amperage and indeed doesn't have a shorted cell(s). These are the 2 easiest and quickest things to rule out. Also, make sure that your battery cables at the battery are clean and tight, also the positive at the jumper point under the hood and that all wires are clean and tight at the starter and starter solenoid. BUT from what you said, I would say that you have a starter solenoid starting to really go bad, not completely shot, but just about there. The solenoid triggers the starter motor to engage and turn the motor to start it. No clicking from the solenoid and the lights staying on when trying to crank is usually a sign of a solenoid that is not "switching", if the lights go dim or out when cranking, its a sign that the starter motor or solenoid is shorted out.
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