It's been done. Here are a couple of threads that discuss the wiring. Good Luck with you project...
http://www.ridgelineownersclub.com/forums/showthread.php?t=38791
http://www.ridgelineownersclub.com/forums/showthread.php?t=43791
http://www.ridgelineownersclub.com/forums/showthread.php?t=38791
http://www.ridgelineownersclub.com/forums/showthread.php?t=43791