After searching for a couple hours for the correct way to install a headlight harness and still keep the factory correct fog light function, I had to figure it out on my own. I just found too many "I pulled the fuses" responses.

It's really easy. Pull your driver side headlight. There are 2 red wires. Cut the red wires like this:



Hook up a multimeter to determine what wire is the hi beam headlights. Turn on your headlights + highbeams. Only one red wire will have about 11volts. When you find that wire, tape it off and put if away - you wont use it. You want the OTHER red wire. This is the red wire that goes to the fog light relay.

Take that red wire and tap it right into your new highbeam wire on the new harness like this:


Obviously you want to tape off or heat shrink the connections. And that's it! Now you can have a better headlight harness and still keep your fog lights that will function as the factory intended.

 

I did a similar thing. I cut the red foglight wire and grounded it to the black wire on the unused h4 connector. My fogs now work with any headlight combo. I thought about doing what you did but in the end I was too chicken to splice into the new harness. lol.

 

Solid. My fogs don't work anyway, but I'd like to get them working in the long run.

 

Yes that works too.. Now do the fog lights work all the time, or does the ignition have to be on?

I thought about doing that too, but didn't want to accidentally leave the fogs on... IF it does that.

 

Do the fogs switch off with high beams?

 

Yes if you wire it up as shown. This is how the factory intended it.

 

And exactly why I wired it up my own way...lol

 

 

To each their own.. I like the factory setup. Are your fogs hot? Meaning if you stuff of the jeep will they still stay on?

 

I wired them to the cigarette outlet so that it would shut off if the ignition wasn't set to accessory or running. So it is not always hot, if that's what you're asking! I have since moved the fogs to my car and set it up the same way and have a 10" LED light bar in it's place, using the same wiring (not factory setup) but using the factory switch.

 

Yeah, there's more than one way to hack and run wiring if you want your fogs on with the highbeams.

 

Yes the fogs work without the ignition, but you have to have the headlight switch on to at least the parking lights. You cant run just the fogs. If your lights are off then the fogs go off too.

 

Good to know. It is easy enough to just ground that red wire to the black wire on the factory harness. Good solution there too if you want the fogs + highbeams at the same time.