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Old 21-06-10, 14:54
rob love rob love is online now
carrier mech
Join Date: Feb 2003
Location: Shilo MB, the armpit of Canada
Posts: 6,931

Most of the failures I saw were not from an overload, but rather from an open. The alternator needs feedback from the system to regulate the voltage. This is called the field. If it is not getting it's feedback then it tries to put out more voltage to get the necessary feedback. It will continue to climb the voltage until it self destructs.

The regulator should charge at 26 to 28 volt. I always found that once they do their climb above 32, they are gone. You will have to change the regulator.

Rpoolie's advice about taking your alt for a test is a good one. They can change the regulator if needed, and test the unit on a bench tester. If all connections are OK, and the batteries test out OK with the hydrometer, then you should be good to go.
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