I built one of Vedder’s Antispark a while back. Is this suppose to let current flow if the switch is in the off position?
No, if it does then the mosfets are blown. Here’s how to fix: [How To] Fix Anti-Spark Softswitch
The thing is the mosfets are new. I am aware of a mosfet being possibly shorted.
my mosfets were new aswell. Either the part was faulty or it died from the sudden load as I hypothesize in my post.