For anyone interested, I installed rain sensing wipers interface module from www.raintracker.com. I paid $99 + 10.47 s/h and was able to complete the installation in 45 minutes. Now that I've done the hard work, you should be able to do the install yourself in about 25 minutes. I will post installation photos and instructions later. It works as advertised, you can adjust the sensitivity by setting the 3 jumpers and not have to purchase the external sensitivity control.