I was having intermittent no start problems, particularly on wet days. I thought that they were related to the switch because they could often be fixed by a spray of contact cleaner into the key slot. Finally the tractor would not start, all the lights come on the dash, the glow plug light would go out then turn the key and nothing. So I bought a new switch and installed it and have exactly the same problem. If I can use a tester correctly the starter solenoid is getting power from the battery, but the red wire that brings current from the switch is not supplying any current to close the relay. I checked my connections at the switch they seem good. What is my next step in troubleshooting?