- Disconnect the wire at 5 and confirm with a multimeter that one coil (MAIN) is terminated at 1 and 4.
- While 5 is disconnected check for continuity between it and 3.
- If wiring is as shown then apply power directly to the MAIN coil on 1 and 4 (or 2 and 5).
The capacitor causes a small phase-shift in the current in the START winding relative to the MAIN winding so that a definite starting torque and direction is produced.
(The wires on 4 and 5 may be swapped. You should be able to figure this out. Either way, apply mains to 1 and 4, etc.)