ThaddeusW Posted February 28, 2006 Share Posted February 28, 2006 Hey guys I cant seem to find out what the third blue knob on the dashboard does. Yellow is parking for the truck/tractor and red is trailer air supply. What does the blue one do? Quote -Thad What America needs is less bull and more Bulldog! Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.