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Wiring diagram for 2007 is there. It's a big file (probably 35mb) but worth the download time. The color coding for the 2007 is probably the same as my 2006. 2006 was same as 2005, but pin# was changed. There are two identical wires in the headlight/dimmer harness. Orange with brown tracer. Maybe another 2007 owner can confirm the color. The one that you want is the outlet wire from the dimmer resistor bank. The pins on the switch are are difficult to view or access, so trial and error is the easiest way. 50/50 shot. Needle probe through the insulation and cycle the dimmer. Meter: 2 volts to 12 volts through dimmer range, or use test light.