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Old 01-19-2015, 08:18 PM   #1
spud
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Default need help with wiring for 2015 STi foglight

I installed the Rigid Industries LED light bar on my 15 STi

http://forums.nasioc.com/forums/show....php?t=2695247

Everything works great. I don't like the on/off switch that came with the light.

I purchased the 15 forrester bezel and fog light switch in hopes that i can use this switch to power my light bar.

Problem is that the pigtail for the OEM switch has 4 wires. The harness for the light bar has 3 wires.

Tried a couple different combos and ended up going through about 3 fuses.

So im stuck. Any help would be appreciated.
LED harness has Red, Blue, and a black wire

OEM switch has Black, Black/white stripe, Purple, Purple/yellow stripe.

Was hoping it would be easy...not so much. I am terrible with electrical.

Pix to help.




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Old 01-19-2015, 09:28 PM   #2
speedrye
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The purple wire and black/white wires tie in to your existing illumination wiring on other switches to light up when your headlights are on.

The black wire and purple/yellow wire will be the two to attach to the Rigid harness. You should be ignoring the black wire on the Rigid harness as it's only there to illuminate the light inside the Rigid switch. Now, you can connect the red and blue wires on the Rigid harness to the black and purple/yellow wires.
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Old 01-19-2015, 10:56 PM   #3
spud
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Dear god man. You are a genius!
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Old 01-19-2015, 11:22 PM   #4
spud
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All put back together. Thank you sir!!
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Old 01-20-2015, 02:21 AM   #5
dlroto
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So does the new switch light up?


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Old 01-20-2015, 08:53 AM   #6
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Quote:
Originally Posted by spud View Post
Dear god man. You are a genius!
Thanks, I've done a lot of wiring on 4wd trucks for off road lighting. My FJ is loaded with LED bars and I'm really thinking of adding one to the WRX like you've done. Even with my HIR and RX350 HID retrofit, I feel like I'm missing light compared to what I'm used to.

Quote:
Originally Posted by dlroto View Post
So does the new switch light up?
It should if he did it correctly!
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Old 01-20-2015, 10:41 AM   #7
spud
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Quote:
Originally Posted by dlroto View Post
So does the new switch light up?


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**Edit**

Yes the button lights up as long as the purple wire and black/white are not cut and stay connected.

Last edited by spud; 04-09-2015 at 05:16 PM.
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Old 01-20-2015, 10:42 AM   #8
spud
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Quote:
Originally Posted by speedrye View Post
Thanks, I've done a lot of wiring on 4wd trucks for off road lighting. My FJ is loaded with LED bars and I'm really thinking of adding one to the WRX like you've done. Even with my HIR and RX350 HID retrofit, I feel like I'm missing light compared to what I'm used to.



It should if he did it correctly!

Super stoked. Thanks again. If anything this thread is now searchable for other folks.
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Old 01-20-2015, 02:03 PM   #9
speedrye
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Where do you find the switch? Are there any other switches that fit as well? I prefer an OEM switch for that clean look that you've now got.
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Old 01-20-2015, 06:09 PM   #10
spud
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Quote:
Originally Posted by speedrye View Post
Where do you find the switch? Are there any other switches that fit as well? I prefer an OEM switch for that clean look that you've now got.

I got it from the 2015 forester fog light kit. It's so popular that the dealer parts had them in stock. I've never had that happen.

Here are the part numbers for the bezel and switch.

You need both.

H4510FJ000 - switch

83472FJ010VH - bezel
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Old 01-20-2015, 06:12 PM   #11
spud
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Pix for reference.



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Old 01-20-2015, 07:36 PM   #12
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How much did the bezel and the switch run you, if you don't mind me asking?
Nice install btw. I plan on adding a few led driving lights to my 2015, but I'm going to go for the NBR race cars look in the front. I'll be getting a JDM grill and cutting holes in it.

For reference..

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Old 01-20-2015, 08:21 PM   #13
spud
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That is nice. I think i paid 62 total. The bezel I think was 17
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Old 01-20-2015, 08:23 PM   #14
D0uglassss
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does the switch come with the pigtail wiring?
Quote:
Originally Posted by spud View Post
That is nice. I think i paid 62 total. The bezel I think was 17
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Old 01-20-2015, 09:46 PM   #15
spud
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Quote:
Originally Posted by D0uglassss View Post
does the switch come with the pigtail wiring?

Nope. It's already in your car. When you open the dash you will see the wire folded back and taped up. Untape it and then cut it.
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Old 01-21-2015, 07:26 AM   #16
2subiesinyard
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Quote:
Originally Posted by spud View Post
That is nice. I think i paid 62 total. The bezel I think was 17
Thanks

Out of curiosity, when you were popping fuses, which one kept going?
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Old 01-21-2015, 09:17 AM   #17
spud
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The one that came with the RI harness.
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Old 05-23-2015, 04:36 AM   #18
joejoe69
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Quote:
Originally Posted by speedrye View Post
The purple wire and black/white wires tie in to your existing illumination wiring on other switches to light up when your headlights are on.

The black wire and purple/yellow wire will be the two to attach to the Rigid harness. You should be ignoring the black wire on the Rigid harness as it's only there to illuminate the light inside the Rigid switch. Now, you can connect the red and blue wires on the Rigid harness to the black and purple/yellow wires.
I'm trying to wire a JDM rear foglight onto this said hidden connector. How would I go about doing it? So far, leave the purple and black/white connected for illumination. As for the black and purple yellow wires in the connector, do they have to be completely cut off and wired to the rear fog black and red wires or can the black and purple/yellow wires be left alone and just splice the rear fog's black and red wires onto it? Am I making any sense? TIA!!
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Old 06-18-2015, 05:09 PM   #19
minus2and1turbo
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Default Possible wiring solution for JDM rear fog light

I also want to use the OEM button. Would this work?

1. Connect the grey harness to the back of the OEM button.
2. Keep the PURPLE and BLACK/WHITE wire intact (to illuminate the button).
3. Cut the BLACK wire from the harness and connect it (coming from button side) to the
BLACK wire of the jdm light. Cut the PURPLE/YELLOW wire from the harness and
connect it (coming from the button side) to the RED wire of the jdm light. The free ends
of the black wire and purple/yellow wire coming from the car side will just have wire
caps on them.
4. Splice a Bussman BP/HHH ATM Add-A-Fuse into the PURPLE/YELLOW wire (that's
connected to the jdm RED wire), and use a viable fuse slot.
5. Splice another BLACK wire with a U-shape or ring style end, and ground it
somewhere in the trunk.
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Old 06-18-2015, 10:56 PM   #20
speedrye
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Nope, that wouldn't work and you'd pop a fuse.

#1 is correct
#2 is correct
Next, you'd take your Add-a-fuse and connect it to either the black or purple/yellow wire. Connect your JDM red wire to whichever switch wire you didn't use for the add-a-fuse. Now, ground the black JDM wire somewhere.

What you're essentially doing is feeding power through the switch and to the lights. When you turn the switch on, it allows the power to flow from the add-a-fuse to the lights. When the switch is off, it doesn't allow the power through it.

Now, keep in mind that the stock switch isn't too beefy and won't hold a lot of power. I don't know it's rating, or what the JDM fog light wattage is though, so you're on your own for that part. Using an LED bulb in there would probably be fine, but I don't know about a halogen.
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Old 06-19-2015, 04:56 PM   #21
Subie FA20
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The way i wired mine up (on a rocker) was:

From JDM, RED > front of car.
From JDM BLACK > ground by tail (bolt)
Then... from RED (in front of car now) to rocker switch.
Rocker switch has 3 prongs; power (fuse/tap), lead (JDM fog) and Ground (find ground spot).

Would i then just run the 2 wires and do the same process as rocker;
Black (from switch) > ground; purple/yellow (from switch) > fuse tap & lead? i'm confused on the lead/power
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Old 06-19-2015, 05:16 PM   #22
minus2and1turbo
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Quote:
Originally Posted by speedrye View Post
Nope, that wouldn't work and you'd pop a fuse.

#1 is correct
#2 is correct
Next, you'd take your Add-a-fuse and connect it to either the black or purple/yellow wire. Connect your JDM red wire to whichever switch wire you didn't use for the add-a-fuse. Now, ground the black JDM wire somewhere.

What you're essentially doing is feeding power through the switch and to the lights. When you turn the switch on, it allows the power to flow from the add-a-fuse to the lights. When the switch is off, it doesn't allow the power through it.

Now, keep in mind that the stock switch isn't too beefy and won't hold a lot of power. I don't know it's rating, or what the JDM fog light wattage is though, so you're on your own for that part. Using an LED bulb in there would probably be fine, but I don't know about a halogen.
Ok, cool. I'll let you know what happens after I try installing it this weekend. Thanks!!!
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Old 06-19-2015, 06:09 PM   #23
minus2and1turbo
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Hey Speedrye, according to subie the bulb power is 12V 21/5W (bulb part# 84920F). Will this be too much for the OEM switch?
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Old 06-20-2015, 08:53 AM   #24
speedrye
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Dang, that's a 21w bulb. Honestly, I don't know because I've never seen the rating on the switch (don't think there is one). It would probably be okay, but the innards of these switches use very fine wires/contacts. Worse case scenario, you cook the switch. I'd use a 2 or 2.5 amp fuse in the Add-a-fuse though so that there's no chance of anything melting beyond the switch while still providing enough power for the fog.

I really don't think it'd be worth adding a relay for that minimal power draw though. If it were mine, I'd try it.
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Old 06-22-2015, 11:10 AM   #25
Subie FA20
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Quote:
Originally Posted by speedrye View Post
Nope, that wouldn't work and you'd pop a fuse.

#1 is correct
#2 is correct
Next, you'd take your Add-a-fuse and connect it to either the black or purple/yellow wire. Connect your JDM red wire to whichever switch wire you didn't use for the add-a-fuse. Now, ground the black JDM wire somewhere.

What you're essentially doing is feeding power through the switch and to the lights. When you turn the switch on, it allows the power to flow from the add-a-fuse to the lights. When the switch is off, it doesn't allow the power through it.

Now, keep in mind that the stock switch isn't too beefy and won't hold a lot of power. I don't know it's rating, or what the JDM fog light wattage is though, so you're on your own for that part. Using an LED bulb in there would probably be fine, but I don't know about a halogen.
You said to connect the jdm harness to the black or purple/yellow wire. That's the button side wire, not harness end side right? So lead (from bulb) to the black wire (button end side of button), and the tap fuse to the purple/yellow (button end wire). And the harness end you just tape off. Right?

Last edited by Subie FA20; 06-22-2015 at 11:16 AM.
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