Wiring Harness
A wiring harness is a bundle of wires and connectors that carries power and signals around the car.
What is Wiring Harness?
Modern cars contain several kilometres of wire. Harnesses are protected by tape, tubes and grommets. Repairs should use the correct wire size and sealed connectors, especially in the engine bay.
How it works
Connectors join the harness to sensors, actuators and control units.
Why it matters for your car
Chafed wires, corroded connectors and rodent damage are common causes of intermittent faults. Some manufacturers offer repair kits for common harness weak points.
Other terms
- Brake Pad Wear Sensor
- Bulb Failure Warning
- Camshaft Phaser (VVT Actuator)
- Charging Card (RFID Card)
- Charging Modes (Mode 2, 3, 4)
- Clay Bar (Paint Decontamination)
- Cold Start
- Crown Wheel And Pinion (Ring And Pinion)
- DOHC (Double Overhead Camshaft)
- Dual Injection (Port And Direct)
- E-axle (Electric Drive Unit)
- Fuel Pressure Regulator
- Fuel Pump
- Insulation Monitoring (Isolation Fault)
- Low Emission Zone (LEZ)
- Repair Estimate (Quote)
- Spark Plug
- Tyre Puncture
- Vehicle Overloading
- ZDDP (Zinc Anti-Wear Additive)