Well if its getting super hot i would start by looking at the connector and the wires on the switch for any opening that would ground it out or short it out. My guess is its touching something and is causing it to short causing it to get hot quick. Just my 2¢
1996 Mustang GT, 17x9 front and 17x10.5 cobra r replica rims, 255/40/17 front 285/40/17 rear at the moment,
o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.