Question about 1988 Chevrolet Suburban
Voltmeter shows alternator putting out a charge when vehicle is idling. The voltmeter will continue to show and increase in voltage. once the voltmeter shows a significant charge, I can begin driving and turn on all electrical devices, heater fan, lights, radio, back window, etc. However, as soon as I brake or let my rpms drop off, the voltmeter shows that I am draining the battery. If I stop, let it idle, it will build back up and I can go again with everyting on.
it sounds like you have a bad diode in the alternator
and since the voltage regulator is internal you will have to replace it or take it out to get tested
Posted on Mar 09, 2009
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Posted on Jan 02, 2017
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