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Old 08-12-2010, 08:42 AM   #1
Big-E
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Default How To: 2002-2007 foglight mod (clean - no butcher job)

Parts needed (RadioShack or N/K/A: "The Shack"):
*Small package of self-tapping ("vampire") connectors, in red (for 18-22 gauge wire).

*Small package of male & female bullet connectors, in red (for 18-22 gauge wire).

*A length of 18-gauge wire (say with yellow insulation shielding) about 6-inches long. Just buy a small spool of stranded copper wire.

REMOVAL/INSTALLATION:

NOTE: it is recommended that you put all of the items you remove in your trunk or cargo area to keep them out of the way while doing your work.

Step 1: remove coin box from driver's side lower dash cover.

Step 2: remove driver's side lower dash cover, one side clip fastener and two screws at the lower part - all phillips type.

Step 3: unplug switches AND unplug the OBD-II connector from the lower dash panel and move the panel completely out of the way.

Step 4: remove 10mm nut from top of fuse box:


Step 5: gently release two clips on either lower side of fuse box and then pull fuse box out toward you to clear the metal bracket, then downward a bit to have room to access the relay block, which is to the right of the fuse box:




Step 6: using a long-nose pliers, gently compress each of the three 'clips' that hold the fuse board to the side of the metal bracket - use a little sidewards pressure to keep any of the now unfastened clips from refastening:



Step 7: move relay block to the right very slightly, then downward to gain access to the back where the wires are:


NOTE / REFERENCE: the third relay up from the bottom is for the foglamps

Step 8: locate the RED WIRE WITH GREEN STRIPE - this is the trigger wire that turns the relay on and off.

IF YOU HAVE A 2002 TO 2004 OR 2005, YOU WILL (MORE-THAN-LIKELY) HAVE TO CUT THIS WIRE.

IF YOU HAVE A 2005 OR DEFINITELY A 2006 AND PROBABLY A 2007 MODEL, YOU CAN EFFECTIVELY UNLOCK THE TERMINAL FROM THE RELAY BLOCK FOR THIS WIRE AND NOT HAVE TO CUT IT, BUT TO MAKE THIS WORK YOU WOULD HAVE TO GET A LOCK-TYPE FEMALE TERMINAL TO PLUG INTO THE RELAY BLOCK THAT WOULD BE ATTACHED TO YOUR NEW 'YELLOW' WIRE THAT YOU'RE GOING TO USE.

THIS IS DUE TO A DESIGN CHANGE TO THE RELAY BLOCK.

Cut this wire approximately 2-inches from the back of the relay block AND install a crimp-on male bullet connector.

Install a crimp-on female bullet connector to the other side of the wire that was just cut - this is the "car side" Why? Because if for some reason you want to restore the foglamps to their original set-up, you can. Also, you don't want a live circuit hanging out behind the dash as well.

You can see the red wire with the green stripe in this picture:


If you look at the picture above, you'll see the vampire clip that I have that is wrapped with orange colored electrical tape. The wire that I tapped into is an "ignition only" switched wire. This is the first relay position up. That wire is GREEN WITH A WHITE STRIPE. This is the starter interlock relay, which means it only works when the car is running/igntion is on. It will not work with the key in the accessory or off position.

What does this mean? It means that when the car is running, I can have my foglights on at anytime. I shut the car off and the foglights go off.

REVERSE ORDER TO REINSTALL.

Happy Motoring!
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Old 08-12-2010, 09:10 AM   #2
hanson
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Wait, I'm confused, can't I have my foglights on at any time anyway when my lights are on by pressig the foglight button?

or am i being dumb...
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Old 08-12-2010, 10:23 AM   #3
VIR-A346
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This mod allows you to turn on the fog lights even if your headlights are off. Great write-up btw.
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Old 08-12-2010, 10:37 AM   #4
hanson
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I see. Very detailed write-up!

Out of curiosity, what is the application of this mod?
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Old 08-12-2010, 10:49 AM   #5
Big-E
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Application: 2002-2007 Impreza (as title says)
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Old 08-12-2010, 11:06 AM   #6
hanson
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What i mean by application is when would you need your fog lights on without your headlights on?
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Old 08-12-2010, 01:33 PM   #7
Bulletproof2000
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for one, the ability to avoid having the glare from the headlights when it gets really foggy, unless you have daytime running lights of course...

looking at this mod, does this affect the turning off of the fog-lights when the high-beams go on?

I should pull out my wiring specs I guess...
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Old 08-12-2010, 02:19 PM   #8
Big-E
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Quote:
Originally Posted by hanson View Post
What i mean by application is when would you need your fog lights on without your headlights on?
You wouldn't. But the "fog light mod" is just that: so you can have your fogs on independent of the headlights. I mean this respectfully.

Quote:
Originally Posted by Bulletproof2000 View Post
for one, the ability to avoid having the glare from the headlights when it gets really foggy, unless you have daytime running lights of course...

looking at this mod, does this affect the turning off of the fog-lights when the high-beams go on?

I should pull out my wiring specs I guess...
No. This mod allows for full use of the fog lights independent of the headlight system.

This of course brings up the question: "why would you want your fog lights on when the highbeams are on?" You wouldn't. But see my response above.
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Old 11-15-2010, 02:02 PM   #9
jrank3792
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IF YOU HAVE A 2005 OR DEFINITELY A 2006 AND PROBABLY A 2007 MODEL, YOU CAN EFFECTIVELY UNLOCK THE TERMINAL FROM THE RELAY BLOCK FOR THIS WIRE AND NOT HAVE TO CUT IT, BUT TO MAKE THIS WORK YOU WOULD HAVE TO GET A LOCK-TYPE FEMALE TERMINAL TO PLUG INTO THE RELAY BLOCK THAT WOULD BE ATTACHED TO YOUR NEW 'YELLOW' WIRE THAT YOU'RE GOING TO USE.

THIS IS DUE TO A DESIGN CHANGE TO THE RELAY BLOCK.

Cut this wire approximately 2-inches from the back of the relay block AND install a crimp-on male bullet connector.

Install a crimp-on female bullet connector to the other side of the wire that was just cut - this is the "car side" Why? Because if for some reason you want to restore the foglamps to their original set-up, you can. Also, you don't want a live circuit hanging out behind the dash as well.


This section confuses me
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Old 01-12-2011, 01:47 AM   #10
slamdspec
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Just did this tonite. Ran into a little snag. For some reason when I spliced to the Green w/ white stripe wire i got nothing. So I just spliced to the wire my turbo time gets power from and everything works great!
Thanks for the write up! It helped alot
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Old 01-12-2011, 09:00 PM   #11
Rayman812
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it's not the green/white wire....the G/W wire is NOT an ignition power wire. the thicker gauge GREEN wire is however.

HOWEVER, there is one problem with this write-up. after u do what the OP says, the green indication light on the foglight button will no longer work. however, the foglights will work independently from the headlights.

to get around that, i simply "jump" the red/green wire with any ignition-only wire (in my case, solid green). dont need to cut anything, just simply add a splice that connects those 2 wires, and u get the fogs to come on w/o headlighs and the button indicator light remains working.

Last edited by Rayman812; 01-12-2011 at 09:05 PM.
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Old 01-13-2011, 12:58 AM   #12
slamdspec
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Quote:
Originally Posted by Rayman812 View Post
it's not the green/white wire....the G/W wire is NOT an ignition power wire. the thicker gauge GREEN wire is however.
I was just following what the write up says..

Quote:
Originally Posted by Big-E View Post
That wire is GREEN WITH A WHITE STRIPE. This is the starter interlock relay, which means it only works when the car is running/igntion is on.
Quote:
Originally Posted by Rayman812
HOWEVER, there is one problem with this write-up. after u do what the OP says, the green indication light on the foglight button will no longer work. however, the foglights will work independently from the headlights.

to get around that, i simply "jump" the red/green wire with any ignition-only wire (in my case, solid green). dont need to cut anything, just simply add a splice that connects those 2 wires, and u get the fogs to come on w/o headlighs and the button indicator light remains working.
Is this an additional splice to the write up or something you should do instead?
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Old 01-13-2011, 09:28 AM   #13
Rayman812
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im just saying if the lack of the indication light on the button bothers you (which it does me) then i would just splice those 2 wires together. its an option to retain that button light. so basically u have an "H" jumper and no wire should be left disconnected to anything.
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Old 01-13-2011, 11:18 PM   #14
kh15
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Quote:
Originally Posted by jrank3792 View Post
IF YOU HAVE A 2005 OR DEFINITELY A 2006 AND PROBABLY A 2007 MODEL, YOU CAN EFFECTIVELY UNLOCK THE TERMINAL FROM THE RELAY BLOCK FOR THIS WIRE AND NOT HAVE TO CUT IT, BUT TO MAKE THIS WORK YOU WOULD HAVE TO GET A LOCK-TYPE FEMALE TERMINAL TO PLUG INTO THE RELAY BLOCK THAT WOULD BE ATTACHED TO YOUR NEW 'YELLOW' WIRE THAT YOU'RE GOING TO USE.

THIS IS DUE TO A DESIGN CHANGE TO THE RELAY BLOCK.

Cut this wire approximately 2-inches from the back of the relay block AND install a crimp-on male bullet connector.

Install a crimp-on female bullet connector to the other side of the wire that was just cut - this is the "car side" Why? Because if for some reason you want to restore the foglamps to their original set-up, you can. Also, you don't want a live circuit hanging out behind the dash as well.


This section confuses me
also confused....
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Old 01-14-2011, 08:55 AM   #15
Big-E
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Quote:
Originally Posted by kh15 View Post
also confused....
I'm a proponent of not cutting wires.

Thus, this is to tell you that if you have an older model, you may not be able to simply back-out the terminal without having to cut the wire.
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Old 05-06-2011, 01:46 PM   #16
Rexxin
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bump just did this mod .... worked great ..... i tapped into the ignition wire so lights work with koeo / koer .......

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Old 05-18-2011, 09:18 AM   #17
TURBOvsV8
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Has anyone tried the "H jumper" listed above? I did this on a 07 STI and foglights turn on with parking lights....add headlights....fogs and low beams work fine....but when I turn on the high beams with the fogs on the SBF No4. fuse under the dash blows.

I just did the "H jumper" nothing was cut. I can't understand why/if I cut the red wire with green stripe and connected it to power it would change my results? Can anyone help?
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Old 05-22-2011, 05:30 PM   #18
BIG BEE
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good day gents n ladies, having a problem with my wiring i think, i have a bugeye sti and live in south africa, i recently purchased a bumper and foglights to match but when i plugged them in i found that the fog light are not working. i have checked the fuse and that is fine as well as tested the lights with a 12v power supply and the bulbs are fine. can you guys please help.


thanks

Bee
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Old 05-24-2011, 08:49 PM   #19
nate02wrx
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Quote:
Originally Posted by TURBOvsV8
Has anyone tried the "H jumper" listed above? I did this on a 07 STI and foglights turn on with parking lights....add headlights....fogs and low beams work fine....but when I turn on the high beams with the fogs on the SBF No4. fuse under the dash blows.

I just did the "H jumper" nothing was cut. I can't understand why/if I cut the red wire with green stripe and connected it to power it would change my results? Can anyone help?
I have an 02 wrx and mine did the same thing So for now I guess I just won't have the green indicator plus I have no lights and it's nightime not good so maybe the jumper only works with 04-05
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Old 05-25-2011, 11:11 AM   #20
TURBOvsV8
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I ended up cutting the red/green wire and everything worked perfect (except the green indicator light) doesn't bother me too much. I also ended up tapping my 12V power into my security alarm so if a problem did happen and blow the fuse, it wasn't blowing my main ignition fuse or fuse for other car functions I may need to drive the car.
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Old 05-25-2011, 07:23 PM   #21
R2D2snail
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nice write up, i need to do this too
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Old 05-26-2011, 12:01 AM   #22
nate02wrx
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Yea I ended up finding a much better way to do it on scooby mods works great has indicator and all I love how it looks
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Old 11-07-2011, 12:49 PM   #23
boostin23
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bump for this. Might try it this weekend
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Old 03-23-2012, 06:21 PM   #24
supra00400
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followed this mod and everything went well except, now anytime that the key is in the ignition and switched to the on position, the fog lights stay on no matter if the switch is depressed or not. does this sound like a bad fog light switch? any and all help is appreciated.
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Old 03-26-2012, 01:36 PM   #25
blue07sti
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Quote:
Originally Posted by VIR-A346 View Post
This mod allows you to turn on the fog lights even if your headlights are off. Great write-up btw.
Cars looks sick during the day when they drive around with their foglights on.
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