Working my way through game issues on a 1955 Williams Three Deuces restoration, the Bonus Stepper Unit is not resetting at Startup. Looking at the bottom of the attached schematic, the Bonus Relay fires the Bonus Escape Coil on the Bonus Stepper and resets it. But the Bonus Relay is not firing at startup. If I manually actuate the Bonus Relay it completes the circuit to the Bouus Escape coil and resets the Bonus Stepper. Thank you for any ideas.
Bonus Unit schematic (resized).jpg