Wires and Wiring Harnesses
FIGURE 36-53
Typical wires in a wiring harness.

Wires and wiring harnesses are the arteries of the vehicle’s electrical system, and as such they need to be kept in good condition, free of any damage or corrosion. They carry the electrical power and signals through the vehicle to control virtually all of the systems on a vehicle. As technology in vehicles has increased, so, too, has the number of wires and cables installed on these vehicles Figure 36-53. Although wireless communication is being used in some vehicle security, entertainment, and tire pressure monitoring systems, wires are still the dominant signal carriers in a vehicle. To help protect wires and keep them organized, they are bundled together in a wiring harness. A number of wiring harnesses are located throughout the vehicle.