If it is a pedal mounted brake light push switch note it's a normally closed (n/c) one. With brake pedal in resting position the switch plunger is pressed but releases when brakes operated. Sort of fail safe - most of the time
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone