Toyota 4Runner Light Relays, Sensors, Control Modules

Modern vehicles make use of many different types of lights – headlights, fog lights, tail lights, turn signals, parking lights, and daytime running lights, just to name a few. In older vehicles, a lighting circuit consisted of a bulb, switch, and power source, but modern cars, trucks, and SUVs have far more complex lighting circuits. Usually, they include control modules, sensors, and relays. The latter enables a low current circuit to manipulate a high current circuit, while sensors make automatic operation or adjustment possible. A control module is used when the system requires something more than just turning on or turning off.

Relays are some of the most common auxiliary components of modern lighting circuits. Basically, it is an electrically operated switch that can turn on and turn off the lights when the signal from the control module is received. As the name implies, a control module is designed to operate the entire system enabling it to work automatically. If any of these components fails, it might cause further problems with the lighting circuit in your Toyota 4Runner. Therefore, it is recommended to replace defective components as soon as possible. Browse our wide assortment of Toyota 4Runner relays, sensors, and control modules to find premium-quality parts and restore your lighting system.