Ignition Switch Changeout

Start (pun intended) by connecting your multimeter or even a 12V test lamp from the coil+ terminal to ground

With key in 'run' and engine stopped you should see about 6--10V, it varies.
Turn key to "start" and read meter while cranking engine. Voltage should be very close to "same as battery," that is----if battery sags to say, 11.5 measured at the battery WHEN CRANKING, then the coil + terminal should be so as well

It is important to understand how the ignition switch works. The IGN1 "run" power IS ONLY LIVE in the run position of the key. It goes DEAD during cranking

The ONLY power to start the engine is IGN2 which is hot in the "start" position, and feeds full battery voltage to the coil + side of the ballast.