I have set up a push button start so it does start. That meansthe battery is good and i have removed and cleaned the terminals and both ends of the batter cables. However when i try to use the ignition switch i can turn left and the glow plugs heat, turn right to on and the tractor runs if i use the push button start, but if i turn the key to start the only thing that happens is the dash lights dim. No click, nothing. I just replaced the ignition switch, a 90 dollar part, but it made no difference. Im trying to locate the fusible link and im thinking starter relay but I'm not sure. Any advice?