Welcome to the North American Subaru Impreza Owners Club Thursday November 26, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Electrical & Lighting

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Closed Thread
Thread Tools Display Modes
Old 11-29-2008, 12:11 AM   #1
Scooby Specialist
Member#: 170439
Join Date: Jan 2008
Location: Sioux Falls, SD
I <3 Lamp

Default Alternator or voltage regulator?

I'm having an issue with my 02 wrx, it's got the stock alternator on it still and what its doing is sometimes when I'm driving recently it'll show 14.5-14.7 Volts on my turbo timer at first then it'll spike up to 15.7 or so then back down, on and off. While this is going on it'll flash the battery light also.

Pretty sure it's the regulator which I'm guessing it's on the alternator. Does anyone got any idea if it is or not?
* Registered users of the site do not see these ads.
sorrowfulkiller is offline  
Sponsored Links
* Registered users of the site do not see these ads.
Old 11-29-2008, 12:53 AM   #2
Scooby Guru
Member#: 53443
Join Date: Jan 2004
Location: Anchorage, AK
2001 LL Bean Outback


You are correct. The regulator is inside the alternator. It looks like you need to replace the alternator.
Cougar4 is offline  
Old 11-29-2008, 03:19 AM   #3
Scooby Specialist
Member#: 33868
Join Date: Mar 2003
Location: Chesterfield, MO
2003 wrx


The battery terminals are clean and tight correct?
rick-l is offline  
Old 11-30-2008, 04:57 AM   #4
Scooby Specialist
Member#: 170439
Join Date: Jan 2008
Location: Sioux Falls, SD
I <3 Lamp


it was the regulator, swapped it with an 02 outback one, works fine. 10 more amps and a hundred fifty dollars less than the wrx one!
sorrowfulkiller is offline  
Old 11-30-2008, 09:15 AM   #5
Scooby Guru
Member#: 55252
Join Date: Feb 2004
Chapter/Region: SCIC
Location: i know, i regret it too
* pullup bar *


the outback is 85amps??
subaru3169 is offline  
Old 05-18-2013, 02:32 AM   #6
Scooby Newbie
Member#: 353711
Join Date: Apr 2013
Chapter/Region: International
2002 WRX Wagon


What part number did you use? I am having the same issue and wouldn't mind upgrading to the higher amperage as well.
kracky is offline  
Old 05-18-2013, 06:23 AM   #7
Trust no one
Member#: 11170
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NYC
02 WRX
15 WRX/05 GTO


This thread is from five years ago. Please don't bump old stuff.
Mulder is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Relationship between alternator whine, voltage, and alternator health caterpill Electrical & Lighting 2 01-16-2005 07:15 AM
FL: Apexi Super ground system/Voltage regulator QwikRex Private 'For Sale' Classifieds 47 10-01-2004 02:03 PM
Voltage Regulator / Lights dimming issue Woody643 Car Audio, Video & Security 9 12-23-2003 12:39 AM
Voltage Regulator Revision Mid West Subaru Owners Club Forum -- MWSOC 4 06-27-2002 01:50 PM
Voltag Regulator? callawayv Service & Maintenance 1 01-12-2002 11:48 PM

All times are GMT -4. The time now is 02:27 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.