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Old 03-21-2007, 10:59 AM   #1
nxwrxfx
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Member#: 92011
Join Date: Jul 2005
Chapter/Region: TXIC
Location: ATX
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2002 WRX STI EJ207
05 Baja Turbo

Default Need some Wiring Help: OEM Fog Light Switch & Aux. Lights!

Hey guys,
I need some wiring help.
I'm installing a lightbar and four Hella 500's soon onto my 2002 WRX sedan very soon.
I managed to pick up an OEM fog light switch that I want to use to engage my four Hella 500's regardless of whether my main lights and OEM foglights are on/off.

How would I do about doing this?
I realize that I'm going to have to wire the Hella's straight to the battery, use relays, etc. but it's been awhile since I've done major wiring so I want to make sure I'm doing the job right before I start installing it all.

At the moment, I do NOT have relays with the Hella lights as I got them second hand. So what type of relay should be the minimum to use for this application? And should I have one relay per pair of lights or can I have all four lights on a single relay?

Also, does anyone have the pin-out diagram for a 2002-2003 OEM foglight switch?

Any pointers are welcome!
I'm not a beginner at wiring, and i've wired up Hella horns, a Pivot water spray controller, and a car audio system before to give you some examples of the work that I'm familiar with.

Thanks!
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Old 03-21-2007, 11:43 AM   #2
rougeben83
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2003 Legacy L Turbo
silver

Default

Pair of relays, each one running to 2 hellas, wired to the switch? The relays I usually see are rated for 30A, you may be able to run all four on one relay on that.

Hook up the switch to an illum wire, like the cig light, or a parking light wire coming from the stalk.
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Old 03-23-2007, 03:09 PM   #3
cMags
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Outback Sport

This relay should be more than sufficient, and this site has great prices and service:

http://www.delcity.net/delcity/servl...d=73576&page=1

They also have relay sockets wired or not wired so you don't have to put female spade connectors on and mix up wires.

As far as the OEM switch goes, from memory there's two wires that actually make the connection for the switch (one you'll tap from swtiched-with-lights +12V, the other will go to the relay), two are for illumination, and one is ground for the two illumination wires. I've got to do the same thing soon, so if I can find my switch, I'll post about it. Otherwise, grab a multimeter and go for it!

Edit: Here we go - thought I had written this up at some point:
http://forums.nasioc.com/forums/show...ght=fog+switch

Last edited by cMags; 03-23-2007 at 03:11 PM. Reason: Thread link
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Old 03-23-2007, 07:35 PM   #4
nxwrxfx
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05 Baja Turbo

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Thanks cMags!!
And d'uh... lol... i have a multimeter, but for some reason that didn't hit me until just now... STUPID MOMENT!

Thanks for that website link too, looks like that'll help a ton!
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