This is from the Australian Forums. I wired OPTION 3 and had no power to the fogs. Here is the fix to all USDM BRZ's per this guy on the Australian Forums.
IN THIS FORUM
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HERE'S THE QUOTE
"Finally got Option 3 installed on a USDM BRZ.. with CORRECT fog functionality (I hate people using it as a brake light!)
Threw together a very high level overview of the wiring and how the lights function.
Thanks OP for the original direction, found out they needed some tweaking though

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[ame]http://youtu.be/67mlTXQyXtc[/ame]