I have a john deere 160 and my pto switch keeps shorting out on me the wiring is pretty bad I thought about rewiring the thing

Hi,
I will attach a picture. There in fact seven part numbers based on serial number. Use JDParts to look for the correct one(serial number is on the tag on the frame near the engine on one side or the other - even that changes):
John Deere - Parts Catalog (http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePa geServlet_Alt)
Peace,
Clarke