The stoplight switch is an air-signaled electrical device that is activated when you depress the brakes.
Stoplight switch operationThe stoplight switch is a component that is usually linked to a double-check valve and can be installed anywhere on the side of the circuit. The switch can typically be found on vehicles equipped with keyless ignition systems and it helps the engine start by pushing the brakes in and pushing the start button. The stoplight switch must remain in good working order to facilitate engine start-up.
Common problems with a malfunctioning stoplight switchA faulty stoplight switch can lead to a no-start condition which means that the engine won't move at all.