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Old 12-30-2012, 04:29 AM
brock5ga brock5ga is offline
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Location: Monroe, GA
Join Date: May 2012
Posts: 96
Mein Auto: Z4
The positive battery power travels from the battery to the jump start terminal, then to the starter, and finally to the alternator. Since you were at the starter, check your main terminal connection to ensure it is tight. Looks like it can be difficult to get to. I do not know if the wiring at the starter is 2 separate round terminals or one round terminal with both wires crimped in. If one round terminal with both wires, wiggle the wires and ensure one isn't loose at the crimp. If all is ok there, check the connections at the jump start terminal and also the back of the starter. I have replaced several BMW alternators that charged cold, then quit hot. I use one of these in the lighter socket with a voltmeter connected to monitor actual charging voltage while driving. Hopefully just a loose connection.
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