Originally Posted by nstg8r
Here's a vacation pic from 2010 for you to check out to see if it will work on older models.
You'll notice this drawing refers to the "combination switch" for the fogs, which seems to indicate the turn signal stalk switch. On my 2010 LGT (build date Oct 2009) it was factory ordered with fogs and has a button located on the dash, next to the outside mirror controls. I haven't been able to locate a diagram for that set-up. It would seem that if you are able to identify the pin out of the button switch, you could remove the connection to the BIU and use the switch to provide a independent ground for the fog light relay. I suspect the fog indicator lamp on the instrument cluster would not function since the connection through the BIU would be removed. The problem I see is, unless you provide switched power to the relay coil, the fogs could be left on inadvertently with the key removed.
I need to think about this more.