JD 240 electrical help

[Checkers]

I have a 2001 JD 240 and my amp gauge has been reading low. When I plug the seatbelt in it draws down farther and even further when I turn on the lights. I dismantled the overhead consule and noticed the hot wire on the 5 prong ignition switch gets really hot when the key is turned on. I am replacing the ignition switch but concerned that the burnt prong may be due to a short somewhere else. I do not have an enclosed cab so add ons are minimal as it's the basic model. I just don't want to replace the switch and burn it out immediately when a simple check of other known short locations could of avoided it. I hear and read a lot about JD wiring problems but nobody ever gets into detail for solutions. Any suggestions would be greatly appreciated. Thanks for reading. PS my local dealer said there was a harness upgrade and for $1,500 they would install it but he also said it may not fix it.