Abstract: A flasher can flash a vehicle light normally powered by a power switch. The flasher has an interval timer coupled to a manual switch. The interval timer can provide in response to the operation of the manual switch a duration signal of at least a predetermined duration. The flasher also has a cycling timer coupled to the interval timer for providing a periodic cycling signal in response to and for the duration of the duration signal. This predetermined duration of the duration signal exceeds the period of the periodic cycling signal. The flasher includes a pulsing relay for providing a power output. This pulsing relay is coupled to the cycling timer for blanking the power output in response to and synchronously with the cycling signal. Also included is a substitution relay coupled to the power switch. The interval timer and the pulsing relay can repower the light from the pulsing relay instead of the power switch, in response to and for the duration of the duration signal.