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
- - - - -

Low voltage reading, but voltage seems ok?


  • Please log in to reply
6 replies to this topic

#1 TROGDOR!

TROGDOR!

    Pastor of Muppets

  • Members
  • 2,106 posts
  • Morgantown, WV

Posted 29 May 2005 - 11:17 PM

This has been an ongoing problem ever since I got my RX... has been annoying the crap out of me. Every now and then the voltage reading will suddenly drop to about 10-11 volts. When it drops, the "Charge" and "Stop Lamp" warning lights come on. This low reading will last anywhere from a few seconds to indefinitely. Today I drove the car 40 miles with it reading like that. Here's the funny thing though- the lights still shine brightly, and it's reading between 13 and 14 volts at the battery. I have a few spare alternators around here, so I'm going to swap one tomorrow and see what happens. This really bugs the heck out of me though- why would it be reading so low if the car is obviously running healthy voltage? Any suggestions?

#2 subeman90

subeman90

    Soobologist

  • Moderator
  • 2,786 posts
  • Akron PA

Posted 29 May 2005 - 11:37 PM

I had an EA-81 do that to me once...it was the fact that the alt. had moisture in it (snow) and it was messing it up. Once it dried out it was fine though. Got a wet alt.?

#3 Phizinza

Phizinza

    Yip yip

  • Members
  • 3,867 posts
  • South Australia

Posted 29 May 2005 - 11:42 PM

maybe just a bad connection on the alt? or in the dash some wheres?

#4 Cougar

Cougar

    Elite Master of the Subaru

  • Members
  • 6,340 posts
  • Anchorage

Posted 29 May 2005 - 11:45 PM

Since the voltage is ok at the battery that means there is a problem with the wiring to accessories. Using your voltmeter check the lead that goes to the fuse panel. Also check the fusible links for a bad connection. One other thing it may be is the ignition relay may be intermittant.

I should also mention it could be the ignition switch.

#5 TROGDOR!

TROGDOR!

    Pastor of Muppets

  • Members
  • 2,106 posts
  • Morgantown, WV

Posted 30 May 2005 - 10:22 PM

Even though it was still reading good voltage at the battery with a multitester, I went ahead and threw on one of my spare alts anyway. Problem solved! I've never seen anything happen that way- but, it *was* a parts store special alternator, and I've seen those fail in any way conceivable. Total junk.

#6 Steveman09

Steveman09

    Subaru Fanatic!

  • Members
  • 420 posts
  • Portland

Posted 31 May 2005 - 12:33 AM

To avoid future electrical problems, I suggest a ground wire kit, these older subaru's have terrible ground systems.

#7 subGSR

subGSR

    USMB is life!

  • Members
  • 240 posts
  • waikaia southland NZ

Posted 31 May 2005 - 01:27 AM

My brat is still doing the same as your RX did . I put a brand new alt on and it still does it. Took it to a auto elec shop and they had no answers. If we go spot light shooting at night sometimes the ute konks out. New battery as well. I assume there has to be a break in the wiring loom.

To avoid future electrical problems, I suggest a ground wire kit, these older subaru's have terrible ground systems.






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users