I operate a 2006 Putz 38 Z. When I set up and activate my controller the horn will sound but when I'm ready to pump the first truck it will intermittently work and then not work at all after. It works when I hit the horn at the hopper but won't work with the switch to activate the controls in the back. Has anyone else had this issue?

you may want to check for corrosion in controller and in the control panel on the back of the pump