there is no such thing as “jumping” a fan, all he’s describing is some burning out a dead diode that exists on some V1 boards directly behind the fan connector. If you don’t have charging on the right side joy con and the fan is not working, check for the diode and just remove it. Do yourself a favor and don’t randomly go injecting voltage into things without knowing exactly why and how to do it.
if you want to test your fan, just remove the heat pipe, turn the console on, and blow some warm air on the CPU die until you see the fan start spinning. You don’t need much heat or time to do this, if the fan kicks on circuit is fine. If the fan doesnt kick on you either have a dead fan or a problem on the circuit.