When the turn signal switch is actuated, either right or left, the circuit is completed to the flasher motor and to the flasher cam contacts. This starts the motor in operation and the cams begin to rotate. As the cams rotate, the three sets of contacts are closed in sequence and the three rear lights are illuminated in sequence beginning at the inboard light, then the center light and then the outboard light. All three lights go out at the same time and the cycle is repeated, as long as the turn signal switch is closed to indicate a turn. The front parking light bulb flashes at the same time as the center rear bulb.