I can't get the cruise to working going down the road. I can idle the truck when the parking bakes are set. I have Jake's they cut out when the clutch is in gaged so I'm guessing it's not the clutch switch. I don't have a switch on my brake pedal. My speedo and tach also work. So I thought I would try the air switch, but I do not know which air switch is for the cruise control. I've found the air manifold behind the steer column just don't know which to change.