Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

voltage fluctuation?


  • Please log in to reply
4 replies to this topic

#1 Snowman

Snowman

    Midnight Passenger

  • Members
  • 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

  • Members
  • 520 posts
  • VANCOUVER,WASHINGTON

Posted 23 September 2003 - 02:08 AM

Bad alternator

#3 Caboobaroo

Caboobaroo

    USMB Drunk

  • Members
  • 6,903 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 VaporTrail

VaporTrail

    Brattitude Adjustment

  • Administrator
  • 11,160 posts
  • Central Iowa

Posted 23 September 2003 - 08:46 AM

check this out....

similar symptoms

#5 struculeus

struculeus

    USMB Regular

  • Members
  • PipPipPip
  • 48 posts
  • Seattle, WA

Posted 23 September 2003 - 10:46 AM

Maybe check the ground...
J




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users