I know this is FAR from the first tutorial, but I felt it needed a little simplifying, so I'm doing it.
This is an easy mod, to do it "the Timmy Way" you need a few lengths of a special wire-wrapping wire called "Kynar Wire" you can get at Radio Shack or order on Amazon, it's pretty easy to find, it's a very thin tinned copper wire with an insulated coating. You also need 2 generic switching diodes and some shrink tube. The diodes are marked with a stripe, that's the Cathode or "Negative End" the other end is the Anode.
This simple circuit will take the switched negative that drives the hi-beam relay and uses that to turn on the low beam and fog relays. Doing this draws very little current, so the wire can be an extremely small gauge. You can make this yourself with little skill.
The project starts with you connecting 2 diodes together at the cathode, attaching 1 piece of kynar wire to the cathode, and each anode, for a total of 3 leads, as pictured below
Then cover in shrink tube isolating and protecting the 3 connections (my shrink job is a little sloppy) and strip the leads pretty long, leaving about 2 inches of insulation.
Open the hood, take the outer cover and inner cover off, locate the 3 relays you are going to pull,
Pull the relays and set them to the side, follow the picture below to identify the 3 connection points, circled in yellow/red
Starting with the hi-beam relay, wrap the stripped kynar wire from the cathode around the correct relay pin, then squash it all together against the body of the relay, as pictured below
Now, plug the hi-beam relay back in and do the other 2 wires to the other 2 relays, no, it does not matter which wire goes to which relay, the only thing that matters is that you connect to the correct pin! When done, it should look something like this:
Like I commented in the pic, tuck the diodes in so everything is in snug, reinstall the covers and you are done! You now have 6-lamp hi-beam goodness! And if you run LED's, wholly crap is it bright!
Here is a little video I shot while driving down a back road home the other night, My phone camera tries, but truly doesn't do the LED's justice. They are crazy bright, even for eBay junk (Opt7 kit with Philips LED's) Pardon my dirty windshield, the bugs around South Carolina are bad this time of year and like to die on my windshield. The LED installation requires no real modification to the housings, just the cap on the back, which I just didn't reinstall. I'm not having issues with rain sneaking in.