Most, if not all components in a vehicle requires a switch of some sort. The size of the switch mainly depends on the nature of the specific component. Various switches that are used in an engine, along with the ignition switch and headlight switches all require specific design that suits their exact functions within a vehicle.
Modern vehicles rely on a whole range of switches relays and warning lights to regulate a variety of processes within the vehicle and the engine itself. The relay in a car is basically an electromagnetic switch, which clicks either on or off whenever power is applied to a coil. This makes sure that the power wire of a particular component is either connected or disconnected. Various relays are used in vehicles to control the electrical systems, such as, alarms and internal and external lighting. Stanley R. Harris offers the largest collection of high quality automotive relays for almost any make or model, all under one roof.
Having a huge inventory of high-quality brands of switches, relays and warning lights, which all serve their purpose efficiently and reliably, means that you are able to find the right component to replace your old car parts with ease.