Check the continuity of the Safety Switch Lanyard. It is normally "open". The color codes of the 2 wires are Black and Black/Yellow. These feed back into the electrical module box. The Start /Stop switch is normally "open". The color codes of the 2 wires are Black, that goes direct to ground, (to stop the engine), and the Yellow/Red that goes to the electrical module box. Check the continuity of this switch too.
I hope this helps.
Karl