Speedo problem on my Gasser

[wasp4banger]

vgsef

Can you tell us what it says on the diode / zener diode?

Mine blew both the diode and capacitor when the wires shorted out, insulation on wires broke down. Capacitor is easy to find replacement, but as the diode blew, don't know what to put back to replace it?

Yes this converts ac to dc as a half wave rectifier.

If you connect a 9v battery (pp9) to the spare wires you can make the clock hold its memory. Mine loses the time after about a minute of killing the motor.