* The obvious, there is too much current drawn when you put the switch in “START” position.
* When in “START” position of the start switch, the starter motor is engaged and draws a lot of current.
* When not in “START”, the starter motor is not engaged therefore fuse will not blow.
* Also, the key switch could have some debris inside the starter switch. Try this. (A) Disconnect the Battery Hot Cable. (B) Put an Ohmmeter on the loose cable and measure to ground while you turn the switch to start. You should have a few ohms but not a short to ground.
* if all else fails, replace the starter motor.
* Good luck… Adios… Jasper…
Jasper Castillo
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