Hi people. I just picked up 2 ford LGT tractors. One is a 100 and one is a 145. Both run and have mower decks. Problem is plug on ignition switch started to melt put on new plug and started the tractor and wire between switch and amp gauge started to get hot and smoke. Could this mean there is something wrong with switch or gauge. And should there be an inline fuse in that wire. Thanks for any help I can get.