No start by turning the key, but will start at relay.

IMHO

Clear case of no voltage on the IGN 2 lead that by passes the ballast resister.


When key is in run, battery voltage is applied to one side of the ballast resister, the other side goes to the coil. This gives reduced voltage to the coil

In start, a seperate cir supplies battery voltage to the coil side of the ballast resister giving full battery voltage to the coil.

When you have the key in run and jumper the starter relay you have some voltage to the coil.

When you use the key, in the start position, the IGN 2 cir is supposed to apply battery volts to the coil but it is not. In IGN 1 cir disengaged at that same time so you have no voltage to the coil.


Lots of tests you could do to prove this but a quick one would be to run a jumper from battery plus to the coil side of the ballast resister.

You proved what I'm saying when you showed 0 volts while cranking.