You could check fuse 7 (20A) headlight relay and fuse 10 (5A) TSM headlamp/flasher unit. If they are both OK it could be a problem with the TSM unit not latching.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone