My craftsman lt1000 will not start. When I turn the key it sounds like a machine gun. I replaced the solenoid. Battery has full charge. I have 12 volts coming into solenoid, but do not have 12 volts coming out to starter. When supply 12 volts to starter tractor starts no problem. My only guess is that the solenoid is not getting ground from the saftey switches. Any help much is appreciated.