Dr tile< the pressure type switch will not cause any problems with the system. I do not perfer to use them because they take some line pressure to activate so a light tap of the pedal lots of the time will not bring the brake lights on.Also ckeck to make sure you have the shoe with the shorter linning on the frt. side and then make sure the emergency brake cable is free and not binding... =woooo bring on the WD 40----Paul
