The first method that can be used involves unplugging the "DRL resistor" from inside the drivers-side fender, above the wheel-well. I'd actually recommend against this method (skip to method 2), because it's easy to lose some of the plastic clips that hold the wheel-well splashguard in place due to breakage. The green DRL dash light will also still come on using this method. There is however less risk of shorting anything while performing this method.
Start by removing the clips for the wheel-well splashguard from the front first and then work your way back. You don't have to remove all the clips, just enough to give you access. You may also have to remove screws that connect the outer lip of the fender to the splashguard.
The arrow in the picture to the right is pointing to the resistor. The green plug above/right of the resistor is the socket where you unplug the wires leading to it. As you can see in the picture, I've already disconnected the green plug from it's socket, and you see it dangling below. Using this method, the DRL's will not come on (although the dash indicator will still come on). I'd suggest taping the ends of the plug just to make sure they don't make contact with anything.
The second method is the one I prefer. It is much easier/better as far as I'm concerned (as long as you don't short anything). It involves removing 2 screws from below the steering column to remove a plastic panel.
Once the panel has been removed, you will see to the left of the steering column a black box mounted by 1 phillips screw. You will need a short screwdriver to remove this. If you can't find the black box even with this picture, start the car, turn off all the accessories, and lift the e-brake up/down. You should hear the relay clicking as it turns the DRL's on and off, and hopefully be able to track down it's location that way.
I apologize for the blurry picture, but you should be able to figure out where it is. You could cut it, but obviously if you cut the wrong wire, or ever want to reconnect it, or want to hook it up to a switch, you just added a bunch of extra work if you snip it. What I did, was I pulled the plug out of the relay box, and used one of the metal ends of my multi-meter wires to push the connector/wire out. It's kind of tricky and I'd STRONGLY suggest you d/c the battery so you don't short anything out, but basically I fiddled and pushed till the clip came undone. I had to put the multi-meter prong in pretty deep, and it took about 10 minutes before I got the hang of it, so be patient, don't break anything, and preferably use something skinny and sharp at the end.
Same box, but it's the gray wire. When you disconnect it, the green dash light for the DRL's doesn't come on anymore. Simple!
Now finally for completeness, a few advantages as well as some disadvantages to disabling your Daytime Running Lights....
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