Originally Posted by lr172
Be sure to install the mag switch upside down. Then up/on should provide an open connection and down/off closes the contact. Don't know how SDS does this, so can't advise.
Mounting "upside down" is a bit of a confusing term when looking at the AeroElectric Z diagrams since all of the switches shown have both NO (Normally Open) and NC (Normally Closed) terminals.
Just mount all of the switches the same way up and follow the terminal numbers shown on the schematic.
They will then work just like the statement in the OP.
When I started looking at the Z 12 diagram I realized that the magneto switch is nothing more than a 20 gauge shielded wire with the conductor to the P lead and the shield to the ground? On the switch end the conductor and the ground connect to the switch? Nothing more?
I have read and understand the P lead is connected to ground when the mag is off and when in the On position the P lead is no longer connected to ground.