Toyota makes a switch that fill fit in the unused, precut slots in your dash. I don't know the part # but this would be the easiest way to switch your lights on and off and keep a factory look. Performance Products stocks the switch but they are asking way too much for it. Ask a Toyota parts guy worth his salt and he should know. My Double Cab has no open slots up high because I have the TRD locker but I see two more down low, below the acc. outlets to be exact. Just punch these out, file the plastic nubs down just a bit, wire up your switch and pop it in.