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Old 06-12-2013, 08:10 PM   #1
Join Date: Apr 2013
Location: Suffolk, Virginia
Posts: 60
Adding aftermarket fog lights using factory wiring

I bought my first jeep last November. Never owned one before, but I just wanted something different. It's a stock 2002 TJ X 6 cylinder auto. It has a hardtop and AC and nothing else. I've been wanting to add foglights and found some at a truck stop in North Carolina. I read up on it in this forum and found that others installed them using the stock wiring which sounded like a great idea. I checked things out and found that most of the circuit was installed at the factory. There are wires going to the relay box under the hood, but no relay. That was no problem. I also found that the on/off switch is part of the multifunction switch which would have to be changed in order to keep it looking stock. I got the new switch at Pepboys.

Installing it wasn't bad. The steering column covers come off with two screws underneath the column and closest to the steering wheel. I had to unbolt the column from the dash and lower it a little to get the switch out. I understand that if you have tilt, this step probably isn't necessary. The multifunction switch is fastened to the column with two torx screws which are right on top, and the wiper switch is also held on with two small torx screws. I tried to upload pictures, but I live in an area with no broadband so that wasn't possible.

Finally, I traced the wires looking for a light blue wire that powers the foglights according to my shop book. I found that no problem, but noticed that it doesn't go all the way to under the fenders like others reported in other models. Got the multifunction switch in and turned it on. I noticed that I get a little green indicator light on the dash telling me the fogs are on. But, and I guess all that matters is what comes after the "but", the blinkers and hazards no longer worked. Of course I figured this out when I put it all back together so I had to take it apart again. I swapped out the new switch with the old switch, and the blinkers worked again. The new switch is bad I guess. I'm waiting on a replacement from Pepboys. Sometimes these replacement parts are really crappy.

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Old 06-12-2013, 08:16 PM   #2
Atthehop's Avatar
Join Date: Jul 2008
Location: NW, NJ
Posts: 3,861
If the lights are of a higher wattage than what the factory uses you should power them using relays. Factory wiring cannot handle heavy loads and will most likely melt and possible start on fire.
Retired my 94 YJ 4cyl 5spd @ 200K
Now in a 04 TJ 4cyl 5spd CV @120K+
Both as a commuter vehicle in NW, NJ
April 2012.downsized and now a 99er.
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