CDL Switch Pin Wiring

[lathamb]

I'm looking to add a fog light switch on the dash near the RSCA/AC inverter switch. I've have a factory CDL switch there also. I want to tap into the CDL switch to power/dim the lights on the fog light switch (it's an on board air factory looking switch). I can't find a good wiring diagram for the pins on the CDL switch.

The wires are green, white, gray, white/black. Anyone know which two I can tap into for the switch light power?

Thanks!