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Old 08-15-2010, 11:18 AM   #251
DnA-WRX
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Great, thanks for the input.
Quote:
Originally Posted by tyscat View Post
At least in theory...
I think.
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Old 08-15-2010, 12:21 PM   #252
tyscat
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If you try it, let us know how it turns out.
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Old 10-05-2010, 10:06 PM   #253
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Q to Zalthras:
Can you connect the cut RG wire to pin 20 RL (this is the F/B#7) from relay instead of going to F/B#3 or F/B #10 ?


Quote:
Originally Posted by Zalthras View Post
I made this picture to hopefully explain a few things about the foglight mod.




What the original poster posted basically is the relay half of the positive side of the mod (red text). Doing this only does allow the fogs to come on without having headlights or parking lights on, but the switch indicator does not indicate the same. You should do the same to the switch side of the red/green wire.

Foglights going off when you flash/turnon high beams is caused by the ground side (blue text). Ground the yellow/blue wire and you will have fogs stay on even if you flash/turnon high beams.
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Old 10-08-2010, 03:26 AM   #254
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Quote:
Originally Posted by Bennett View Post
The only thing I notice is the fog light switch indicator light will dim down a little when I turn on the brights.

Bennett
Is this normal or is there a way to mod the fog lights without this happening?
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Old 10-08-2010, 09:50 AM   #255
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Quote:
Originally Posted by GuamSTI View Post
Is this normal or is there a way to mod the fog lights without this happening?
See where the author says (in blue lettering) to cut the wire before it goes into the diode? That is incorrect.

What you want to do is jump or cut the wire after the diode. This way there will be no "bleed back" of power to cause the fog-light indicator to illuminate.

If you really want to do this clean without cutting any wires, locate Connector B71 and either:
a) back out terminals #16 and #17 and make an "extension wire" with terminals to connect the two together or
b) use red-colored 18-22 gauge "vampire" clips and join #16 and #17 together.
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Old 10-08-2010, 04:21 PM   #256
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I want to, but I have yet to try to make my fogs stay on with the high beams or make the switch light up correctly, but I did notice one thing that is weird with my original modification.
When my lights are all off, and I just turn on the fogs, when I go to flash my high beams, just the right high beam turns on. Anyone else notice this?
I was wondering if any of those other modifications would fix this issue.
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Old 10-08-2010, 04:29 PM   #257
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I modified my wiring so that at the fog lamp relay, pin #23, I have a switched feed to it. So when the car is running, my foglamps can be turned on and will stay on whether or not the parking lights, headlights or highbeams are on.

I have also modified my low and highbeam harnesses at those relays to have the highbeams as my DRL's.

So in short, no, I have not experienced only one highbeam coming on as a result of my modifying of the foglamp and headlamp system.

Having the switch illuminate means you would have to either run a new wire to pin#1 on the switch or effectively trace out (which would be a nightmare to do) where the main feed comes off the highbeam relay and rewire it before the split to the relay and switch.

Subaru was smart when they wired the USDM foglamps. The illuminated part of the switch when it's turned on is really a dummy-light of sorts. When it's on, you think that the switch is actually powering the foglamps when it's not. It is just there to activate the ground for the foglamp relay and the green indicator lamp is to tell you that the foglamps are on. So in this manner, it is not a simple "I'll tap into and bypass the power-feed to the switch to make my foglamps work when I want them to" rewiring.
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Old 10-08-2010, 04:40 PM   #258
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I've seen a few posts mentioning fog lights burning out faster than usual. Anyone having that problem? I'm fairly certain it is because I am using cheap fog light bulbs. From an electrical stand point, I'm fairly certain there couldn't be another cause (and I'm fairly savvy with electrical issues). I would welcome thoughts though.
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Old 10-08-2010, 05:24 PM   #259
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Quote:
Originally Posted by tyscat View Post
I've seen a few posts mentioning fog lights burning out faster than usual. Anyone having that problem? I'm fairly certain it is because I am using cheap fog light bulbs. From an electrical stand point, I'm fairly certain there couldn't be another cause (and I'm fairly savvy with electrical issues). I would welcome thoughts though.
Sounds like cheap fog bulbs. I was using some cheap ones and they would burn out real quick. Then I think I went with sylvania and those seem to last a really long time.
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Old 10-12-2010, 09:51 AM   #260
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ive been reading this thread and all the info on here sounds good. i would like to ask LESLIEx317537 if this mod works exactly for a 2002 wrx or are things a bit different?

i have a set of HID's in my bugeye headlights and are only single beam (yes i know about the whole having HID in halgen lenses but they were free so i took them for now lol) so when i turn on my fog lights the HIGH beam indicator shows up on the dash and the fogs stay off im guessing because its reading as if theres no power or something going to the highs (im an electrical newbie sorry if im wrong)

but in short what can i do to mod my fogs to have them operate with the parking lights so they are on all the time like that? im actually willing to pay someone around NY to help me do this so if anything if anyone can help me out with some info or actually physically do them for me that would REALLY help as i want to have my fog lights working again

Thanks in advance guys
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Old 10-12-2010, 04:21 PM   #261
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I don't know about the 02 WRX's but I'm pretty sure there is a thread with a how to on the fogs like this one. If anyone has the link feel free to post it here and I will add the link to the first post.
I also would like to compile what other people have done to make the indicator stay on and the fogs stay on with high beams so I can place them in the first post so people can easily find the information.
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Old 10-15-2010, 11:04 AM   #262
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Quote:
Originally Posted by LESLIEx317537 View Post
I don't know about the 02 WRX's but I'm pretty sure there is a thread with a how to on the fogs like this one. If anyone has the link feel free to post it here and I will add the link to the first post.
I also would like to compile what other people have done to make the indicator stay on and the fogs stay on with high beams so I can place them in the first post so people can easily find the information.
This should be easy enough.

Use the same wire that was used to allow the relay to trigger on. Split off from that and splice it into the illuminator power-in pin for the switch.

Look at the diagram in Post #253 above. If you can cut the wire from the high-beam relay before the split then that's going to solve both problems at one time. Meaning, you'll have active power to both the relay-trigger and the switch indicator.
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Old 01-19-2011, 11:56 PM   #263
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Just did this mod on my 06 wrx. Worked great. Used a alligator clip to piggy back it off the cig lighter!!
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Old 01-20-2011, 12:05 AM   #264
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Quote:
Originally Posted by LESLIEx317537 View Post
Sounds like cheap fog bulbs. I was using some cheap ones and they would burn out real quick. Then I think I went with sylvania and those seem to last a really long time.
Confirmed. I got some nicer bulbs and they've been running great for a long time. Anyone have suggestions on good yellow halogen looking bulbs or some nice white halogen bulbs to match the headlights on an '06 STI?
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Old 01-20-2011, 04:03 AM   #265
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Quote:
Originally Posted by tyscat View Post
Confirmed. I got some nicer bulbs and they've been running great for a long time. Anyone have suggestions on good yellow halogen looking bulbs or some nice white halogen bulbs to match the headlights on an '06 STI?
I believe there these Piaa bulbs, like piaa ions or something there very yellow an bright. Sorry I'm forgot the name of em but just thought I'd lead ya in the right direction
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Old 05-11-2011, 11:20 AM   #266
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Quote:
Originally Posted by tyscat View Post
I've seen a few posts mentioning fog lights burning out faster than usual. Anyone having that problem? I'm fairly certain it is because I am using cheap fog light bulbs. From an electrical stand point, I'm fairly certain there couldn't be another cause (and I'm fairly savvy with electrical issues). I would welcome thoughts though.
Actually this was happening to a lot of people, including me on my 2004 WRX. It was almost as if the fogs were receiving too much juice when run alone or w/o the low beams on. There was another thread somewhere on here that had a different way of doing this which didn't run down the fogs prematurely. I did this mod but started only having my fogs on with the low beams at the same time (or high beams), but never alone and never with just the parking lights on and my bulbs started lasting much much longer.

EDIT: Is there a way to have the fogs enabled when the parking lights come on? I'm not interested in having the fogs come on whenever the switch is turned on without anything else being on. I'd rather just slave them to the parking lights instead of the low beams and keep them on when the high beams are on as well. Does that make sense? I have a 2011 WRX.
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Old 11-24-2018, 06:51 AM   #267
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Default 04 Forester XT

Good day,

Great thread... the circuit for an 04 Forester XT was slightly different.. I modded mine by separating the relay block and addressing the red/green wire terminating at #21 on B225

Result: I can switch fogs on with accessory power, they stay on with low/high beams. The switch light on indicator does not illuminate with headlights off, is bright green with low beams and it dims with high beams.



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Old 11-26-2018, 06:24 PM   #268
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Wow old thread.

Cool that you were able to do it to the Forestor.

I unfortunately sold my STi back in 2015 while I had my 2012 TT FJ. Then I traded that in for a 2016 TRD PRO Tundra and then traded that in for a 2017 TRD Pro 4runner. I wish I kept all of them. haha
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Old 11-26-2018, 08:24 PM   #269
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Quote:
Originally Posted by LESLIEx317537 View Post
Wow old thread.

Cool that you were able to do it to the Forestor.

I unfortunately sold my STi back in 2015 while I had my 2012 TT FJ. Then I traded that in for a 2016 TRD PRO Tundra and then traded that in for a 2017 TRD Pro 4runner. I wish I kept all of them. haha
Nice vehicle choices! I miss my 1998 TRD Supercharged 4Runner... It got me hooked on forced induction and tuning! I have the FXT and a 2005 STi... Both built and tuned by me! Love the Subarus (cars and community)
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Old 12-03-2018, 07:38 AM   #270
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Wall of words.

Nice job OP, btw!!! This is more applicable than mine due to not needing the stalk turned on.

Not trying to crap on OP’s post as this is legit.

But, and I’d have to dig deep in NASIOC, but there’s a module, I believe the DRL module over near the passenger fender and one up in the under dash on the passenger side, that lets you use your OEM button to turn your fogs on and off at will. Google search “independent fog light mod”. The only catch, doing it my way, is the lights have to be turned on at least one click which would illuminate the tails and little running lights also. But there’s no cutting.


Also, if you go OP’s route, there’s an easy write up on how to use an OEM foglight switch as an on/off switch for anything you want to control. Which would fit right next to your preexisting fog light switch,

I, for instance, have two foglight buttons. One controls my foglights the way I described. It allows me to run the fogs with no low or high beam, or run them with lows and highs on, for back roads and whatnot.

However my 2nd foglight switch controls the on/off of my low beams, despite whether I have the switch turned on for headlights. Sonthe low beams and high beams operate independently from the headlight stalk. The stalk still controls blinkers, high beams on/off. Everything I’ve done is simply plug n play wiring and is 110% reversible!

I didn’t necessarily mean to do this, happened after my retrofit was broken from retread and I reinstalled my OEM hid headlights, but utilized all my wiring, how I had it wired for quad bixenons, which require me to be able to turn off the projectors located on the high beam section as all four projectors being on was to much light for public road driving. It was more light than two new HID BMWs sitting next to each other. It was epic, but definitely not necessary. A single set of 3” D2S 4.0 or comparable projectors is more than enough light, FFS

Not that I do this ever as I’m not a child and I’m not running from anyone and I honestly respect the danger that driving without taillights is, but I realized I could ghost all the lights on the rear, while maintains my lows and high beams and fogs up front.

I do this using two separate wiring harness for retrofits where they accept a headlight input, then allow you to send it wherever, and control the power to the harness however you want.

Pics of my quads. I really need to reassemble them, just not going as blacked out next time. And I’m not giving up my quads, just saying that if your interested in retrofitting, one pair is enough....lol




Sorry to hijack OP. You done did a good thing!
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