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Old 11-14-2015, 12:46 PM   #1
reide181
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Join Date: Mar 2011
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2011 WRX Limited
Satin White Pearl

Default How To: 08-14 Independent Fog Mod (with a side of DRL delete)



How-To: Independent Fog Mod (with a side of DRL delete)
Price: Less than $10
Full Build Thread: http://forums.nasioc.com/forums/show....php?t=2665770

Materials:
-12 gauge wire (~12")
-x3 male and female quick disconnects
-fuse tap
-zip-ties
-electrical tape

Functions:
-Totally independent fog light control
-Powers with 12v (ignition)
-Retains factory switch

Disclaimer: I didn't tell you to do this and you probably shouldn't. I take zero responsibility. Off-road use only.

One of my favorite mods on my previous OBS was the independent fog light mod so I could use my fog lights without the headlights. This could be used for many reasons, but for myself, I'd rather use the fogs than the factory DRLs during the day.

I've had my DRLs disabled since day one for 2 reasons; they are ugly and they ruin your high beam bulbs. Have you ever noticed the ugly brown tint on the high beam bulbs? Yep, it is because of the continuous use at 50% resistance. To fix the ugly part, I simply disabled them and decided to use my fog lights instead. They look cooler anyway and many modern cars have this feature from the factory.

The DRL delete is super easy to do. Most do it from under the car. Some can reach it from the top. All you do it unplug the module/resistor circled in red. Secure the connector out of the way and that's all. I removed the entire unit but that's just me.



Now onto the fog re-wire. So this came from lots of wiring diagrams and reading. I'm sure most of you know how a relay works. My thoughts were bypass the factory remote/trigger source (low beams). I would pick up a new remote from the fuse box (same place my boost and AFR gauge get power). Then, to use the stock switch, wire that back to the fog relay, skipping the low beams again.

Sounds hard, but it's not.

First remove the dash under the steering wheel. Start with the side access panel near the fuse box on the drivers side and remove the 2 philips screws holding the main dash piece on:



Then remove the metal plate under the steering column (x2 10mm):



Finally, remove the plastic cover directly under the steering column and wheel (x1 philips). The sides are attached by plastic snaps, firmly and carefully pull down. You'll need to unlock the height adjustment lever to remove the plastic piece once free:



Now you are ready to wire. Locate the fog light relay (bottom, rightmost when facing the front of the car). There are 2 complete connections you need to make:

1) BLACK/GREEN wire from the foglight relay to 12V from the fuse box.

2) VIOLET/YELLOW wire from foglight relay to VIOLET/YELLOW wire from turn signal stalk. (NOT the blue/yellow).

You can do this in any order, but lets start with the turn signal stalk. Find the violet/yellow wire coming from the harness. Be careful NOT to pick the blue/yellow wire. Remove the factory electrical tape and separate the wire from the others. Cut with equal length on both sides incase you need to go back to stock one day. At this point add the quick disconnect to the end leading INTO THE STALK and tape away the end leading INTO THE HARNESS:



Next, locate the 2 wires you need behind the foglight relay. Black/green, violet/yellow. Cut both wires with enough space on either side incase you need to reconnect the stock wiring. You will be working with the wire ends leading into the relay. Tape the wires leading into the harness away safely. Add quick disconnects:



Again, the black/green wire will now get connected to the 12v source from one of the empty fuses in the fuse box using a fuse tap. I used the same one as my gauges.

The violet/yellow wire gets connected to the violet and yellow wire from the turn signal stalk. This is were you needed the 12 gauge wire. Run the wire down the steering column following the same path as the factory wiring. Once under the dash, run the wire to the fog relay and complete the connection.

Tape and zip-tie what you need to make a clean under dash situation lol. Test and done.




The functions of the fog lights now completely change. They will no longer be controlled by the low beams. They will turn on and off with car if the switch is left on all the time. The factory fog light switch still works the same on/off.

Keep in mind, since the fog lights are completely independent of the low beams, the fog lights will no longer turn off when you turn on the high beams. This isn't technically legal in PA because now you will have more than the maximum allowed forward facing lights (unless you are bi-xenon). In PA this number is 6, this mod makes 8 (x2 low beams, x2 parking lights, x2 high beams, x2 fog lights). This is one of those small weird laws that no one notices, you won't have trouble passing inspection. If the small chance you do have trouble passing, disconnect your fog lights for inspection. In PA your fog lights do not need to function to pass inspection. See disclaimer above

Last note, the fog light indicator on the gauges will no longer work. This doesn't bother me because it is one less light on the dash I need to look at lol.

I did this mod years ago on the OBS. When I traded the car, I reconnected the fog lights as stock in 10 min. If you plan to go back to stock one day and while you are wiring, add some quick disconnects to the stock wires so going back to stock is very easy!

More stuff you shouldn't do:
-Fog Light Bake and Clear (Output Mod) (link)
-Headlight Bake and Clear (link)
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Last edited by reide181; 12-21-2015 at 06:57 PM.
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Old 11-23-2015, 10:07 AM   #2
lil_rexy
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CWP

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Anybody have a DIY like this for a '15+ WRX?
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Old 11-23-2015, 10:23 AM   #3
reide181
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Satin White Pearl

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Quote:
Originally Posted by lil_rexy View Post
Anybody have a DIY like this for a '15+ WRX?
You have the same relays I believe. You might be the first to do it! Look up wiring diagrams to confirm. I Google searched and found them
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Old 11-24-2015, 03:21 PM   #4
cappasjr
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question... if I tap the black/green wire into parking lights, would my fogs come on along with my parking lights instead of headlights? I'd like to do it this way so I can run the C lights (parking lights) in my 2016 along with the fogs.. I think it'll be a good look..
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Old 12-04-2015, 01:30 PM   #5
reide181
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Quote:
Originally Posted by cappasjr View Post
question... if I tap the black/green wire into parking lights, would my fogs come on along with my parking lights instead of headlights? I'd like to do it this way so I can run the C lights (parking lights) in my 2016 along with the fogs.. I think it'll be a good look..
Yes, that should work fine. If it doesn't, try Diode Dynamics Always On module for the C lights paired with this mod!

If you do this on your 15/16, can you confirm the same process works so I can update the thread?
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Old 02-29-2016, 10:19 AM   #6
boost junkie
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Thanks for this writeup! I did this plus the DRL delete over the weekend. It was super easy, only took about an hour. I tapped the audio fuse using an add-a-circuit and a 10A fuse. Now my JDM multicoat fogs are my DRLs and they look great, a million times better than the stock DRLs. Just need to replace the bulbs with LED since I'm a little worried about the heat generated by having halogen bulbs on all the time. I've heard of OEM glass fog lenses shattering from getting too hot and having cold water or snow splashed on them.
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Old 02-29-2016, 11:55 AM   #7
reide181
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Quote:
Originally Posted by boost junkie View Post
Thanks for this writeup! I did this plus the DRL delete over the weekend. It was super easy, only took about an hour. I tapped the audio fuse using an add-a-circuit and a 10A fuse. Now my JDM multicoat fogs are my DRLs and they look great, a million times better than the stock DRLs. Just need to replace the bulbs with LED since I'm a little worried about the heat generated by having halogen bulbs on all the time. I've heard of OEM glass fog lenses shattering from getting too hot and having cold water or snow splashed on them.
Glad it went well. Add a circuit is the best way to do it!

I think the glass will be fine. Not sure about the JDM versions but the USDM versions have glass that's about 1/4 inch thick. Will be tough to break that!
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Old 02-29-2016, 02:55 PM   #8
boost junkie
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Quote:
Originally Posted by reide181 View Post
Glad it went well. Add a circuit is the best way to do it!

I think the glass will be fine. Not sure about the JDM versions but the USDM versions have glass that's about 1/4 inch thick. Will be tough to break that!
Maybe I'm just paranoid because I broke a JDM fog on my old GD and had to order a new set from Japan (expensive). Those things were huge though, and I drove that car a lot more than I do this one.
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Old 01-23-2017, 11:52 PM   #9
silverstihatch
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Any thoughts on doing this while also adding in demon eyes to take place of the drls?
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Old 02-01-2018, 05:41 PM   #10
GoatzWRX
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So I didnít do the DRL delete but I did the independent fogs. I got everything wired up and it worked they were independent but my DRLs didnít turn on. I was wondering the reason to why this is?
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Old 02-01-2018, 05:57 PM   #11
lowbee
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I wish I can see the pictures in the 1st post. Would the OP be kind enough to re-host them somewhere else...... Bad Photobucket .... Thanks for the write up.
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Old 02-11-2018, 01:15 PM   #12
ZionZR2
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Dark Grey Metallic

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Really late to this party, but better late than never.

I just started this process after reading many forums threads and wiring diagrams. (probably should have done this a long time ago doesn't seem as bad as I may have first been led to thought)

First step was to disable the drl. DONE!

Unplugged the resistor. Located passenger side engine bay behind oem fog light position next to hi note horn. (Service manual does not give this info directly. Shows a horn in the picture but shows drives side for removing splash shield. The Horn diagram gave better location, but unnecessarily states to remove entire splash shield.)

Next Step will be to independent fogs. Need to have some time to track down the wires i need to tap into and cut and splice an what not, but I know which wires to look for. also want to do this in a way that i can quickly put it back to stock should i ever need to.

Final step will be to replace the fog lamp bulbs with some new led bulbs.

Optional step will be to add a switch between the DRL resistor and connector so I can disable/enable the DRLs from the driver seat.

Thanks for the post.
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Old 02-11-2018, 06:06 PM   #13
Big-E
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Quote:
Originally Posted by ZionZR2 View Post

Optional step will be to add a switch between the DRL resistor and connector so I can disable/enable the DRLs from the driver seat.

Thanks for the post.
You would want to install a relay before (power in) the DRL resistor, not after (power out) and then use the switch to enable/disable the circuit via the relay.
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Old 02-11-2018, 09:10 PM   #14
ZionZR2
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Quote:
Originally Posted by Big-E View Post
You would want to install a relay before (power in) the DRL resistor, not after (power out) and then use the switch to enable/disable the circuit via the relay.
I had wondered about that and makes sense. I will keep that in mind should I follow that option.

Thanks for the tip!
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Old 01-26-2019, 09:13 PM   #15
davidwys
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Just performed this mod...thank you for posting such a thorough write up. I did have a couple of things I would add to this.

1. When running the wire from the steering column to the relay (VIOLET/YELLOW to VIOLET/YELLOW) make sure there is enough slack to fully extend the wheel in the furthest position.

2. Removing the dash panel is not required. Getting the steering column cover off is the same as mentioned, but the wire can be snaked through without the dash panel removed. It will make tidying wires easier though.

3. I cut the wires on the relay box ABOVE the factory electrical tape and then pulled them out of the bundle. This allowed for more wire to fiddle with while I was jammed under the dash.
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Old 01-27-2019, 10:42 AM   #16
CaptainSlowbaru
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Quote:
Originally Posted by reide181 View Post
In PA your fog lights do not need to function to pass inspection.
This is false. If they are installed, they have to work.
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