Reply to "Alternator Light always on"

rockyMember

If JFB is correct (failed diode in one of the legs), you should be able to find this with a voltmeter (actually an ohmmeter) with the alternator in the car.

If all the diodes are good - you should be able to measure resistance between B+ & D+ in one direction, and basically, an open circuit by just switching your meter leads.

If one of the diodes is failed, and is conducting, you should see a similar resistance in both directions.

Or you could use the "diode-checker" setting of your Harbor Freight meter to evaluate it.

Rocky

2/26/185:25 PM

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