Wiring front fog lights to rear fog light switch. - Toyota FJ Cruiser Forum
 
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#1 (permalink) Old 09-20-2011, 05:28 AM
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Wiring front fog lights to rear fog light switch.

What I'm aiming to do, with a little help from you lot, is to wire my new front fog lights that I have in my bull bar to the factory rear fog light switch on the dash. I want to be able to turn on and off both front and rear fogs at the same time from the one switch. I've done a bit of searching and can't really find what I'm looking for, so I'm appealing to any of you who are handy in the auto-electrical department.
So here's what I'm dealing with....
the back of the fog lights have a positive and a negative input


the switch i want to use in the dash


and the wires going into the plug


looking from behind when the locking tab is on the left the eight slots in the plug from top left are:
1 white with black stripe 2 EMPTY
3 EMPTY 4 red with silver dots
5 green with silver dots 6 EMPTY
7 black with red stripe 8 light green with red stripe


my plan was to locate the 12v power out wire and tap into it and go straight to the fog and then find somewhere decent to earth the lights (probably back to negative battery post). Job done????/
So my question is will it work? Or am I stuffing something up by not picking the power up on the other side of the fuse box (relays, fuses etc)
If it will work, how do I pick the power wire at the switch? I can only get the plug about 2cm out of the dash so its f***ing tight in there.
Or am I missing something completely?
Any help would be greatly appreciated.

285/70R17 Cooper STs, OEM Rock Rails, BRC Diff Breathers, ARB trade rack, Dual Battery System, ARB bull bar
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#2 (permalink) Old 09-20-2011, 05:58 AM
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I have the OEM PIN layout for switch posted on a thread, here. I'll find and provide shortly.

Can search "PIN Layout request" and it should come up. Be a few posts down, but it's on there.

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#3 (permalink) Old 09-20-2011, 06:22 AM
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Found this provided by TinCan, whose been a go to guy for electrical questions I've had.

Wiring front fog lights to rear fog light switch.-imageuploadedbyautoguide1316521124.406601.jpg

As for how to power, I'd think that tapping power at the switch would still have to go to relay to power lights, but I'm not electrically proficient, especially considering the OEM function you're tapping into is part of the CAN-BUS and may adversely affect other functions.

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#4 (permalink) Old 09-20-2011, 08:07 AM
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Re: Wiring front fog lights to rear fog light switch.

I have ordered a new switch and wired that up to spotties.

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#5 (permalink) Old 09-20-2011, 05:11 PM
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Re: Wiring front fog lights to rear fog light switch.

Thanks for the replies guys. I've done a fair bit of searching around and I had found that pic of TinCans in one of your threads Chris.... It seems however that I have 5 cables going into my switch, so which one am I missing and will they still be in the same order considering my plug has 8 inputs.
FJCSYD thats the sort of look I'm after, nice and neat. I'll do the same for my spotlights when i get them. The idea behind wiring the fogs together is for aesthetics and to be able to save those switch blanks for future jobs without having to make room in the dash panels.
The more I go on, the more it sounds like I need an auto sparky. I'm confident in doing all the work myself but finding the wires etc is where I think I need a hand so here I am.
From what it sounds like I need to find the 12v "on" wire as it comes out of the relay. Am i right?

285/70R17 Cooper STs, OEM Rock Rails, BRC Diff Breathers, ARB trade rack, Dual Battery System, ARB bull bar
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Last edited by Moritz; 09-20-2011 at 05:13 PM.
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#6 (permalink) Old 09-20-2011, 09:53 PM
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Re: Wiring front fog lights to rear fog light switch.

I like the mod FJCSYD did. I did a similar modifaction. The ability to have them on and off independelty is good also.
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#7 (permalink) Old 09-22-2011, 06:31 AM
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Re: Wiring front fog lights to rear fog light switch.

I just ran power to a relay from the rear light, and wired in the fronts from the relay.


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#8 (permalink) Old 09-23-2011, 04:31 AM
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Re: Wiring front fog lights to rear fog light switch.

Quote:
Auto-Craft previously said: View Post
I just ran power to a relay from the rear light, and wired in the fronts from the relay.

Nice one Daz. That's just what I was after. Where did you pick up the power from the rear fogs? Did you find somewhere up front of did you go all the way from the back?

285/70R17 Cooper STs, OEM Rock Rails, BRC Diff Breathers, ARB trade rack, Dual Battery System, ARB bull bar
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#9 (permalink) Old 09-23-2011, 04:34 AM
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Re: Wiring front fog lights to rear fog light switch.

Quote:
Auto-Craft previously said: View Post
I just ran power to a relay from the rear light, and wired in the fronts from the relay.

Hi Auto-craft,
Is that the warn bar on the front of your rig ?
Cheers
Baz
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