The Foot Pedal on my EverLast PowerTig machine stopped working and I want to buy replacement parts instead of an entire new pedal $$$. By stopped working, I mean it does not initiate any arc, nor gas valve, etc. The pedal is totally dead, so we think the Pedal's switch is the problem. The WP26's Torch's switch works fine, so I'm pretty sure it's just the pedal. Does anyone know how to ohm test the Pedal's switch and the potentiometer?