1990 Ford Tempo Fluctuating electrical current

1990 FORD TEMPO
17,800 MILES • 6 CYL • 2WD • AUTOMATIC
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MOJO83
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When my Ranger is idling my electrical guage shows
fluctuation from about mid normal to peaking 18 amps
My lights fluctuate with this, I've had the alternator tested both on & off the vehicle & it passes, when driving the vehicle the fluctuation increases,
Any suggestions ?
Feb 9, 2009 at 2:09 PM
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FIXITMR
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you mean driving vs idling?i would get a scrap yard replacement and see if problem persists.could be a ground or wiring glitch?maybe battery is low on water/weak cell?this is not my area of expertise so i'm guessing.seems like something is effecting regulator operation.
Feb 13, 2009 at 3:20 PM