Welcome to the North American Subaru Impreza Owners Club Wednesday July 30, 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 04-22-2006, 01:10 AM   #1
Motts
Scooby Newbie
 
Member#: 89738
Join Date: Jun 2005
Chapter/Region: MWSOC
Vehicle:
2000 Impreza 2.5RS
Aspen White

Default ABS on/off using factory fog switch

Hi,

Ive done some searching and tried sending some PMs (no replies) but still have some questions. I have an extra fog light switch from an 02 Impreza. The pinout looks like this:

|..|
...|
...|
|..|

Heres the links I found.
http://forums.nasioc.com/forums/showthread.php?t=931210
http://forums.nasioc.com/forums/showthread.php?t=398000
http://www.scoobymods.com/forums/showthread.php?t=5784
http://www.tovey.ca/home/wrx/abs.htm

I had a switch with an LED, located on the center console that stayed lit when ABS was engaged. It had the two pins for the contacts and a ground for the LED. When power went through the switch it kept the LED on, even without the car on.

I want a cleaner look. I would like to use the fog light switch in the same manner however, Id like the LED to turn off when I turn the car off. I wasnt sure if the factory fog light switch is latching and is there a way I can wire it so the LED turns off with ignition without using relays?

So heres what Id like to do, Im asking for help on whether this is possible and what I need to make it happen:

1. Turn ABS on and off from switch
2. When ABS is engaged the LED lights up on the switch
3. When I turn the car off the LED turns off
4. When I turn the car back on the ABS is still either on or off, same as
before the car was turned off, and the light turns on if engaged.

Also, I tried Acetone to eat away the white decal for the fog light and it didnt work. Is there a protective cover over the decal? How can I get rid of that without using a sharpie and coloring it?

If anyone knows what Im talking about could you please tell me what pins I should hook up to where?
Motts is offline   Reply With Quote
Old 04-24-2006, 11:39 PM   #2
locosti04
Scooby Newbie
 
Member#: 70940
Join Date: Sep 2004
Chapter/Region: MAIC
Location: Northern VA
Vehicle:
2004 Impreza WRX STI
Java Black

Default

why do you not want to use a relay?? you could use an accesory wire to trigger the relay and only let it be on when the key is in. ?????
locosti04 is offline   Reply With Quote
Old 04-25-2006, 03:19 AM   #3
Motts
Scooby Newbie
 
Member#: 89738
Join Date: Jun 2005
Chapter/Region: MWSOC
Vehicle:
2000 Impreza 2.5RS
Aspen White

Default

Or I could just use Ignition to power the switch so that its powered only when the car is on. Why use accessory and why use a relay?

Well I guess I should be more clear. Id like advice on what pins to connect to what in order to accomplish what Ive listed. Theres the real question.
Motts is offline   Reply With Quote
Old 04-25-2006, 09:16 AM   #4
LastResort
Scooby Guru
 
Member#: 99289
Join Date: Oct 2005
Default

Do you have a functional description of the pins of the switch? I might be able to give you a hand if you had that.....But without more information I am flying blind.
LastResort is offline   Reply With Quote
Old 04-25-2006, 10:23 AM   #5
cMags
Scooby Specialist
 
Member#: 88668
Join Date: Jun 2005
Chapter/Region: NESIC
Location: Lowell, MA
Vehicle:
'05 Outback Sport
5MT - Regal Blue / Grey

Outback Sport

Functional description of the foglight switch pins:

1 3
--4
--5
2 6

#1- ground for the ON bulb.
#2- ground for the illumination bulb (this ground actually varies depending on the brightness of your dash)
#3- +12 volts when key is on ACC (powers both ON light and relay)
#4- +12 volts for illumination bulb when dash is illuminated
#5- out to relay
#6- same as above (can be used for another relay)

Note: This diagram is for sending power through the switch to a relay for aux lighting. Pins 3 and 5 are what short together when the switch is on. Pin 6 is another pin 5.

(I noticed that the spare switch that I got is missing wire #6 from the plug inside the car - just an observation to be aware of)

Pulling the ABS fuse (aka opening the circuit) is what turns off ABS, right? In order to do this safely with a switch, your switch would have to be able to handle all the current (however many amps the fuse is rated for). Problem is, the switch probably isn't rated for that amperage. Here's how you should connect it:

I would connect pins 2 and 4 to pins 2 and 4 on your actual foglight switch (assuming you have one - you should at least have the wiring for it under the dash) so you get the illumination feature. Connect pin 1 to ground (a jumper to the metal dash bracket works fine).

Pin 3 should be connected to accessory or ignition (a 12V source that's only on when the car's on). Pin 5 should be connected to the #86 post on a standard automotive relay, #85 post to ground. #87 to the ABS fuse, and the wire that was connected to the fuse to the #30 post on the relay. What this does, is allow the output on pin 5 to trigger a connection between posts #87 and #30, connecting the ABS fuse, enabling ABS. Turning the switch off, disconnects the fuse, disabling ABS. (You may want to find a 5-post relay, with a #87a post, which is normally connected - this way if you use #87a instead of #87, the switch works opposite (switch on disables ABS), and if for some reason the switch fails, ABS will default to on).

No time to draw up a schematic now, but if you need more help, PM me and I'll get one to ya.

I've taken off that label, and it's just a thick (~1mm) layered plastic sticker. The milky-white for the label is on the back, and the black is in the middle of it. It seems unlikely you'd be able to change it w/o making a new one. Taking it off reveals holes that you can see the lamps through. If you plan on opening the switch (which is how I got the sticker off), be careful, as there's springs and small clips in there that like to go flying. Don't ask how I know... It's a real pain to get it back together again.

Hopefully that helped, good luck!

Last edited by cMags; 04-25-2006 at 10:43 AM. Reason: Realized the need for a relay.
cMags is offline   Reply With Quote
Old 04-25-2006, 10:49 AM   #6
LastResort
Scooby Guru
 
Member#: 99289
Join Date: Oct 2005
Default

Well, it looks like cMags covered the basics. With some clever relay usage, it would be simple enough to have it reset every time the car is turned off.
LastResort is offline   Reply With Quote
Old 04-25-2006, 12:34 PM   #7
Motts
Scooby Newbie
 
Member#: 89738
Join Date: Jun 2005
Chapter/Region: MWSOC
Vehicle:
2000 Impreza 2.5RS
Aspen White

Default

cMags thanks alot. Ill give it a try. Im very familar with relays so I understand what youre saying. I dont need a schematic if you dont want to waste time. Ill use the relay to be safe since the ABS circuit has a 20A fuse and thinking about it youre probably right about the switch not handling it.

So in order to remove the white fog light sticker I have to open the switch? I could use a small piece of black electrical tape to cover it once I get it off to cover those holes. Id really like to remove it.

Thanks again.
Motts is offline   Reply With Quote
Old 04-25-2006, 11:08 PM   #8
cMags
Scooby Specialist
 
Member#: 88668
Join Date: Jun 2005
Chapter/Region: NESIC
Location: Lowell, MA
Vehicle:
'05 Outback Sport
5MT - Regal Blue / Grey

Outback Sport

If you're gonna use electrical tape to cover the holes, I'd just use it to cover the sticker. Or Sharpie. Or remove the sticker (either by opening the switch, or trying to carefully with a thin blade like a hobby knife or tweezers) and replace it with something else cut to size. If I figure out an easy way to make a new sticker/label I'll post it here.
cMags is offline   Reply With Quote
Old 04-26-2006, 03:10 PM   #9
cMags
Scooby Specialist
 
Member#: 88668
Join Date: Jun 2005
Chapter/Region: NESIC
Location: Lowell, MA
Vehicle:
'05 Outback Sport
5MT - Regal Blue / Grey

Outback Sport

Here we go, I got pics of the fog light switch torn apart:

Front of the switch:


Back showing the wires coming out of the clip:


The spring pops open when you pop the clips out:


Opened, you can see the two lamps, the contacts, and the peice that makes the connections. (Be careful, that metal clip is just sitting there, and will fall out.)


Hard to see, but theres a little hook that goes in a "V" groove, which is the on/off locking mechanism (the mechanism is upside down here):


There's the hook again. The switch face slides through the button housing, and holds the two round tabs in those holes:


Here's what you see looking inside the switch face:


And popping out the label, you can see how the back of it looks, and that there's a little clear panel that goes over the "on" light:


Well that's about it. Maybe I should send this over to Scoobymods... Good stuff to have for reference.
cMags is offline   Reply With Quote
Old 04-26-2006, 10:55 PM   #10
Motts
Scooby Newbie
 
Member#: 89738
Join Date: Jun 2005
Chapter/Region: MWSOC
Vehicle:
2000 Impreza 2.5RS
Aspen White

Default

Thanks man this a stupid-proof right up. I already tried using sharpie on the outside and it looks horrible. Thats when I decided Id like to remove it all together.
Motts 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
Installing an ABS on/off switch on an 07 WRX Desi_drifter395 Brakes, Steering & Suspension 11 10-10-2008 10:02 AM
Factory Fog Switch w/after market lights Doyle138 Electrical & Lighting 2 07-30-2005 11:02 PM
ABS on/off switch? alacrity024 Brakes, Steering & Suspension 4 01-28-2004 05:34 PM
Switch ABS on/off? 95hrdtp Brakes, Steering & Suspension 1 11-18-2002 10:37 PM
ABS on/off switch jamz New England Impreza Club Forum -- NESIC 23 01-31-2002 11:01 AM


All times are GMT -4. The time now is 04:36 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.