Signal Switch Signal switches are used to operate turn signal devices. This switch acts like most other lighting circuits with a few differences. The switch also runs through a signal flasher which allows the lights to flash. There is also a detent set on the steering column that resets the switch to the neutral position after a turn has been completed.

More Info. In order to signal a stop, a brake pedal operated "stoplight switch" is provided to operate the vehicle's stop lamps. In addition to lighting the conventional rear lights, the switch also operates the center high-mounted stop lamp, that became mandatory on later models. Cruise control equipped vehicles may also utilize a vacuum release valve. In this case, both the vacuum release valve and the stoplight switch are actuated by movement of the brake pedal.