I am wiring my P Mag switches. I intend to use a three position Honeywell 2TL1-50 from Steinair with down (power on ignition off), center (power on ignition on) and momentary up (+12v power interrupted for testing internal alternator).
I think I understand why the center and up positions of the switch do what they do. What I do not understand is: why would we want +12v going to the #5 pin on the P mag at the same time we are killing it by grounding the #4 P lead? Don't we want to just ground the P lead to kill the P mag?
I think I understand why the center and up positions of the switch do what they do. What I do not understand is: why would we want +12v going to the #5 pin on the P mag at the same time we are killing it by grounding the #4 P lead? Don't we want to just ground the P lead to kill the P mag?