Welcome to the North American Subaru Impreza Owners Club Thursday December 25, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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.
Reply
 
Thread Tools Display Modes
Old 01-31-2005, 12:50 PM   #1
TopKatz
Scooby Specialist
 
Member#: 36793
Join Date: May 2003
Location: Malden
Vehicle:
04 WRX
Silver

Default Gauges jump when AUX dimmer turned down

I have an 04 wrx. I intalled a set of Omori gauges into a din pannel. Every thing works fine for th emost part. My problems occure when I go and turn the dimmer down to around 1/4 or lower power. The neadles on the two elctrical gauges start flaking out. Jumping up and down. If I turn back up th einterior dimmer it subsides.

The gauges are all spliced into the clocks dimmer unit. Is there a electrical explamation and solution for this?
* Registered users of the site do not see these ads.
TopKatz is offline   Reply With Quote
Old 01-31-2005, 01:26 PM   #2
satrya
Scooby Specialist
 
Member#: 5887
Join Date: Apr 2001
Chapter/Region: BAIC
Location: Fremont, CA USA
Vehicle:
2002 GDAA
797

Default

Afaik, many electrical gauges only have 3 leads on each of the gauges: signal, (+) power, & ground. Connecting the (+) power & ground to the switched/dimmed supply to make the backlighting & needle dim & brighten along with the oem interior illumination means altering the voltage to the electronics that perform whatever measurement the gauge is supposed to do.

The reason is that electrical gauges with 3 leads are designed to be wired into cars with variable (+) supply instead of switched ground. Since Subaru uses switched ground for the interior illumination, you will either need to add a conversion circuit to power electrical gauges with 3 leads, or live with the fact that you can only use the constant illumination on them.
satrya is offline   Reply With Quote
Old 01-31-2005, 11:57 PM   #3
IowaRS
Scooby Newbie
 
Member#: 5385
Join Date: Apr 2001
Location: Rapid City, SD
Vehicle:
2012 WRX Base
Ice Silver

Default

Does your gauge have separate wires for the lighting?

Or is it the 3 wire type that satrya described?

If it has separate lights and signal, FIRST you need to actually ground your gauges to a good ground NOT the illumination ground, because the illumination ground isn't ground, it varies from ground (lights bright) up to 12 volts (lights dim). I suspect this is why your gauges go batty when you dim the lights, they aren't grounded properly.

If you do have separate light wires on the gauge, you need to put one terminal of the light to a +12Volt line (probably the same line you use for the gauge power) and the other side can go to the "variable" or "ground" side of the illumination on the clock.
IowaRS is offline   Reply With Quote
Reply

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
VDO EGT gauge goes wacky when lights are turned on nicknaz Electrical & Lighting 2 09-20-2007 06:18 PM
So when to turn rotors and when not to turn rotors... Brahmzy Brakes, Steering & Suspension 2 01-11-2006 02:43 AM
05 STi gauges dimming more than usual when headlights are turned on. Moshpit552 Electrical & Lighting 3 10-20-2005 07:30 PM
HELP-installed dimmer mirror and boost gauge-running lights will not turn off cjsalv63 Electrical & Lighting 3 10-09-2004 03:09 PM
needle on gauge moves when turn signal is on Rickyh Electrical & Lighting 2 11-24-2003 12:22 AM


All times are GMT -4. The time now is 12:41 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.