Long time lurker first time poster! I just bought an 86 420 with a 60" deck and it ran and worked fine when I purchased it. I had to take the deck off so I could transport it home. Once I got it home I had to take the seat pan off so I could make modifications to slide the seat back. I put it all back together and hung the deck. It started but when I hit the pto switch and the 20 amp fuse blew. After doing that 5/6 times it wouldn't start with the key switch. The seat switch has been bypassed by the PO. Now, if I hot wire the pto from the battery, it works. I hot wire the fuel pump on the ignition plug, it works. I hot wire the starter on the ignition plug, it runs. The light on the dash won't work ( I changed it also). Nothing works with the switches. Only the kill switch. What's wrong with it?