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1990 Ford Tempo Fluctuating electrical current

Tiny
MOJO83
  • MEMBER
  • 1990 FORD TEMPO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 17,800 MILES
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?
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Monday, February 9th, 2009 AT 2:09 PM

1 Reply

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
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.
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Friday, February 13th, 2009 AT 3:20 PM

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