I don't think you need to turn it on if that short was the cause of the failure. You should pull the complementary output and see if that's failed as well, and then check the emitter resistors, and driver transistors, plus check for any visually burnt flameproof resistors. Basically when an output shorts, it usually takes out some other parts with it - your goal now is to find which parts those were, hopefully without blowing up more stuff. You'll want new output/s, shoulder washers, and whatever else is needed to make sure the same thing doesn't happen again - and it's probably worth re-doing with fresh isolators on the other output/s as well if you suspect this could happen on those. It's probably also a good time to build a dim bulb tester if you haven't already, so that when you fire it up with fresh parts, it doesn't blow another set of outputs if you missed something.