1) If in fact the faulty insulation shorted to ground, that indeed could have fried the module depending on what wire was shorted.
2) If the elec switch was passing and switching excess current over its rating, that can eventually cause a failure. Such may be caused by a coil with too low of primary resistance such as an unballasted 6 volt coil used on a 12 volt system, but if that were the case, the coil would run very hot and could fail before the elec switch crapped out. An elec switch is rated to pass and switch x amount of current which is why the correct coil with the correct amount of primary resistance should be used. However if its the old stOck coil AND THE RIGHT RESISTANCE it shouldn't be the cause of the switch failure. You obviously need a 12 volt coil on a 12 volt system or a 6 on a 6 volt system, but on some of the high energy high voltage set ups some external ignition ballast may still be required. That's why if you buy a switch from say Pertronix you need to be sure it will work with whatever coil you use!!!
3) On some of the high energy systems where you use a high energy high voltage coil, some degree of resistance/suppression is required in the plug wires (ie carbon core wire) HOWEVER if its a stock correct voltage coil and NOT a high energy high voltage coil, plug wires (wire or carbon) most likely were NOT the cause of a failure
4) The after market elec switches are NOT the degree of quality found in modern automobiles and can fail on their own even if all else is correct $hit happens lol
I would NOT be afraid of another elec switch, just make sure its a match for whatever coil you use.
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Today's Featured Article - Chores - by Frank Young. The ceaseless passing of time! It is at once our friend and our enemy. It measures our progress and it makes us old. Like most features of our life, few things are all good or all bad, and most such judgments depend on our own perspective or viewpoint. In our particular hobby, we enjoy the nostalgic return to the days of our youth as we recreate many of the scenes that took place on the family farm that served as the stage for the first few acts of the play that is our live
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