Why does ignition switch keep burning out?

Answer 1

Usually, when an electrical switch repeatedly "burns out," the cause is that the total electrical load [current, measured in Amps], of all the electricity using devices is greater than the switch was designed, intended, and manufactured for. Most often this overload is caused by the addition of heavy power consuming devices, like for example, monster sound system amplifiers, or auxiliary light bars with multiple lights which draw heavy current. Another possible, but unlikely, reason is the use of an "underdesigned" switch, or the installation of the wrong switch.