Stop in for a cup of coffee

nope. i think it may have been due to the huge subs and amps the PO tried running. combined with the electronic ignition conversion over amping the system.
Nah, the Amplifiers yes, the other no. You can only run so many AMPS thru any given conductor/wire or device, connector/ switch. That connection was under engineered for about 35 AMPS. Which is a lot in 12 volt DC. Anything over that, and it over heats and causes Resistance, which in turn makes it get hotter and causes more resistance which gets hotter.......You get it? Review Ohms law..Ohms Law Calculator