In Fender The turn signal light assembly is the unit that houses the vehicle’s directional signals. The turn signal light assembly consists of a turn signal bulb, a reflector and generally a daytime running light or parking light. They may come with or without bulbs. Turn signal light assemblies are mounted on the front on each side of the vehicle. Newer vehicles have the turn signals integrated into the headlights and do not have dedicated turn signal assemblies. euromotiv is your source for genuine and aftermarket turn signal light assemblies should you need to purchase a replacement.