Originally Posted by Boredop
Correct me if I'm wrong, but isn't that the purpose of a SPST switch?
To give a dead short? No.
A SPST switch is designed to connect the incoming wire with the outgoing wire. Both wires are POSITIVE.
The op connected a positive to a negative and that is a dead short. No different than tossing a crescent wrench across the battery posts, he just used small gauge wire that burns faster!