[fredv]

I took the car on the road this morning, with the test lamp connected to the solenoid terminal of the relay.
With the dash OD control handle pushed in (automatic position), the light burns at 28 mph approx. and I can hear the click of the solenoid when I listen carefully.
Just after the lamp burns, the grinding noise starts.
When I slowed down the car, the light stops burn at 22 mph meaning that governor and relay are working) with a little noise.
I stopped the car, I pulled the OD control handle out (locking mechanicaly the OD), and the lamp starts burn again at 28 mph and stop burn at 22 mph.
There was no grinding noise, but still little noise at 22.
It should mean that the electric system still works when the OD control handle is pulled out, as there is no rail switch on my transmission to shut down the electrical system.
Is it normal that the solenoid is always energized above 28 mph even if the OD is manually disconnected?
Then, I disconnect the ignition terminal from coil on the relay and after that, no noise at all from the transmission.
Did I miss something in the wiring diagram, and how the rail switch is replaced to cut the juice from the system above 28 mph ???