I've installed dozens of sets of off road lights on various vehicles. I installed two sets on my 100 last Sunday and I wired them up today. I decided that I would tap into the fuse box on the fender well and wire them to the parking lights. Disassembling the fuse box is a PITA. The reason I did this is it sort of makes it impossible to forget to turn them off. I used a Toyota 4Runner Downhill Ascent Control switch in the furtherest left bank below the rear window switches. I'm looking for a differently scripted factory switch. I love that it looks factory and is a good quality switch, but it would be nice if it had a light on it. In my 80 I actually rebadged the switches to make them say what I wanted. However, the 100 switches do not come apart as easily. So tonight was the big night to try them out. I left the driving lights on by accident but because of how they are wired they were not really on. When I went out to the Cruiser to go for a little test drive I hit the unlock button. I was a little surprised as all 4 of the driving lights went off with the parking lights. At first I thought, oh no, what did I do, until I realized I left the lights in the on position. Anyway, if you want to wire similarly. It is a blue wire with red spots on in the row towards front of the vehicle furtherest from the driver's fender. I'll try to get some photos tomorrow. I changed my avatar last week from my 80 to the 100 right after I installed the lights, but I'll post a bigger photo and one of the switch.