I have that same situation but the tractor will blow the fuse and it will shutdown. I’ve inspected the wiring and using a test light to the positive side of the fuse I get power and when I test the other side I can hear the ignition relay clicking. I replaced the relay and now it works but I need the get to the root of the problem. Anyone have any info?
I have a 2015 Mack MP-8 that pops the fuse for the ignition key switch and the tractor shuts down abd will not start. I need a wiring schematic to diagnose what the problem is. Any info would be greatly appreciated. Thank you