Question about 1997 Isuzu Rodeo

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Losing voltage 14.44 down to 12.87. Drop will cause A/C comp. clutch to squeel. At idle voltage is OK. If I goose the engine voltage will drop to 13.06-12.26 and recover when the throttle released.

Have already replace the compressor with the burnt out coil. Replaced the alternator. Both old and new alternators do the same thing. Battery is 10 months old and has been tested and passes. Have no idea why voltage is dropping which is causing the A/C clutch to slip and squeel and eventually will burn out the coil.

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Trace your alt wire, sounds like it may have a bad spot in it jumping fire, happened to me once

Posted on Apr 03, 2015

Testimonial: "There are no bare spots in the wiring and if there were, the wire would have to be on bare metal to create a large constant draw. Almost imposible to 'jump fire' with and electrical current. If it was ignition spark, I would agree on a 'miss' in the engine but that is not my issue."

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