The present invention relates to a light signaling system apparatus for motorized vehicles and a process for installing said system. This invention relates to a light signaling system for motor vehicles wherein the lights may be positioned in any location on any motorized vehicle. Specifically a vacuum sensing device is incorporated into an internal combustion engine such that the vacuum sensing device completes a circuit and turns on a desired light when a driver accelerates, decelerates, or maintains a constant velocity in order to alert others of the driver's intentions.