I am getting ready to install some aftermarket fog lights on my new JK. As with other posters, I live in a state (PA) where lights have to be wired a certain way in order to pass an annual inspection. Accordingly, fog lights have to be wired to shut off when you use your high beams.

Here is my installation plan (and I promise a write up with pics when I'm done):

The lights will be on the stock bumper or air dam, no light bar
I will use a relay with the power from the battery
Wires will be run to inside through clutch cable opening
The switch will be powered by tapping into the low beam wire or circuit and mounted by the set of factory switches in the center dash

My only problem is finding the low beam wire. It's really cramped by the front lights and I am no electrical expert. Can anyone offer any help for the low beam power source?

 

I wired my driving lights in similarly to function only on highbeam. I t-tapped the trigger wire in behind the passenger side headlight, (W/Gy wire there is for high beams, others i cant tell you) and your right, it is WAY tight in there, but i did manage it.

I cant get to a schematic from here for the exact wire color info you would need, so hopefully someone else can get you a color.

 

Thanks for the info, you at least ruled out 1 wire. Does anyone else know the color of the low beam wire and/or have a good location to tap into it?

 

OK, so I'll resort to begging and pleading...

I do not have factory fogs, so I need to know which wire to hit for the low beams and the best (or even a good) place to get it.

 

No factory wires for fogs hidden somewhere? Some systems have the wiring even though the option is not installed.

Anyway, wire colors are as follows:
Left low beam power is WT/DB
Right low beam power is WT/TN

 

ronjex, thanks a lot. You had said that the wires may me miltiplexed which could cause problems hooking in fogs. I am using the low beam wire to power my switch, the power for the fogs will come from the battery via a relay. Do you see a problem with this type of setup?

Thanks again for looking up the color codes. I really appriciate it.

 

I mentioned multiplexing because I want you to be aware of it. It probably will not be a problem with what you want to do, but I don't know enough about it on our JK's.
On some vehicles, the computer doesn't like it when it sees something unexpected in the circuit.
HappyCurmudgeon, in a post above, did something similar with good results.

 

This question has been asked a ton of times, and while it makes perfect sense to assume ther would just be unused wiring there for the jeeps that dont have fogs, no one has ever found any. It simply isnt there. The wire bundle that crosses in the front carries wires for the esp/bas, but unless you order it with fogs, they dont install them. Sucks,but it is what it is.

I had factory fogs (went bye~bye with the bumper). I wired in my aftermarket fogs so that the power to turn on the aftermarket relay is the power that USED to be the original foglight power. (I used the power at the bumper from the factory fogs to trip the aftermarket relay.)




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I installed aftermarket driving lights. I wired them in so they will only have power available when the high beams are on. But i have the ability to turn them on or off when the High's are on.



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I also have long range spots on my A-Pillars. They are wired in exactly like the above circuit, so they can only be turned on when the high beams are on.

This was done to comply with NYS inspection laws as they where explained to me.--------------------------------------------------------------------------------------------------------------------
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I wanted to try this one,but the government frowned on the idea.

 

HappyCurmudgeon,
I like the idea of driving lights when high beams are on. Thanks for the diagram. I'll give it a try.
I have found the stock lights are not very good. If I adjust the lows to be helpful, the highs are too high. If I bring the highs down, the lows are too low.
Aux lights on high beam would do the trick. I just need to find some lights that are good enough.

 

As an aside, even if I could find a factory fog harness, since my JK did not have them originally equiped, the computer would not supply power to the harness without tyhe dealer's help (and some $).

Does anyone have any fears about t-tapping or scotchloking the low beam wire?