Product Details: Prepare your semi truck to be Ready for the Road Ahead™, with the VSM Universal 4-Wire Turn Signal Switch that provides reliable control of turn indicators. With a sturdy design that mounts directly to a steering column, this replacement component allows operators to display turn signals as well as high/low beams. Fashioned with ready-to-go wiring for a fast and easy installation. FleetPride is your First Click in Heavy Duty®.