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Guest Message by DevFuse

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voltage fluctuation?

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4 replies to this topic

#1 Snowman


    Midnight Passenger

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  • 3,538 posts
  • Haines

Posted 23 September 2003 - 01:59 AM

I am kind of baffled.

When my car is just cruising along, the voltmeter will sometimes fluctuate by a few volts.

At idle, the voltage will fluctuate more, occasionally going down below 12 volts.

Regardless of engine speed, the turn signal or brake lights will cause a voltage fluctuation and a slight dimming of the headlights.

Voltage regulator bad? Alternator? Something else?

It's got an almost new Optima battery in it.

#2 Russ Hill

Russ Hill

    Jesus Freak

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  • 520 posts

Posted 23 September 2003 - 02:08 AM

Bad alternator

#3 Caboobaroo


    USMB Drunk

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  • 7,157 posts
  • Oregon City

Posted 23 September 2003 - 03:33 AM

this is a good sign your alternator is going bad. At least its not going up in voltage and not stopping because that can start to fry major electrical parts. I know if your alternator goes bad and you have a digital dash, it can sometimes take a toll on the dash which we all know, is not a very cheap part:banghead:

#4 mcbrat


    Brattitude Adjustment

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  • 11,185 posts
  • Central Iowa

Posted 23 September 2003 - 08:46 AM

check this out....

similar symptoms

#5 struculeus


    USMB Regular

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  • 48 posts
  • Seattle, WA

Posted 23 September 2003 - 10:46 AM

Maybe check the ground...

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