Control Unit Connector
- Check for voltage at control unit connector Blue wire with ignition on. There should be voltage. If there is no voltage, check wiring between control unit and ignition coil.
- Check for voltage at Black/Yellow wire with ignition on. There should be voltage. If there is no voltage, check wiring. Check Black wire (1300 models) or Brown/Black wire (all other models) for continuity between control unit and ground. There should be continuity.