A control for controlling a signal device in a vehicle for signalling an intended reverse operation of the vehicle. The control defines a unitary device removably installed in the gearshift console of the vehicle so as to be actuated by movement of a portion of the gearshift lever disposed within the console. The console housing may be provided with an opening through which the control is installed and the control may include a mounting plate removably secured to the housing at the edge of the opening with the mounting plate extending effectively across the opening. The control includes a switch and a switch operator disposed in the path of movement of the gearshift lever portion within the console housing.