When I try to start my tractor all I get is a clicking from the starter/ solenoid. I have tried jumping it with my truck and I get the same thing. I tried crossing the posts on the solenoid and starter while jumping it and got the same clicking. I have checked all the wiring and did not see any obvious problems. Connections to battery are clean and tight along with the starter connections. I have not had the battery tested yet. Some times I have lights and some times I don't. The tractor is about 5 years old and I have abused it. This is the only problem I've had. Any help is appreciated.