This harness basically connects all the electrical components of your trailer brake system – the brake controller inside your truck, the trailer connector in the back, and all the lights and brakes on the trailer itself. It's a pre – wired assembly, so instead of having to run and connect a bunch of individual wires, it’s all done for you in one neat package. It handles the power and signal wires needed for everything to work properly – the brake signal, the running lights, turn signals, things like that. Think of it as the central nervous system for your trailer brakes. It takes the signal from when you hit the brake pedal in your truck and transmits it to the trailer brakes, telling them to engage. It also handles power delivery to the trailer lights. Without it, your trailer brakes won’t work, and your trailer lights will be out. It’s specific to trailer brake controllers, though – it’s not the same wiring for your truck's normal brakes. Well, safety is the big one. If this harness is damaged or poorly connected, your trailer brakes might not work correctly, or at all. That’s a serious situation, especially when you’re hauling a load. You'll notice if you have a bad connection or broken wire pretty quickly – things like brake lights not working, intermittent brake function, or even a complete loss of trailer braking. A good harness makes installation easier and ensures everything is properly connected and protected. You can find a lot of options at places like Fixparts Online, and it's worth getting a quality one to avoid headaches down the road. It acts like a shield for those connections, protecting them from the elements and vibration. Satisfaction guaranteed: Wiring Harness (MPN 8946046302) comes with a 12-month warranty!

About Wabco

WABCO specializes in air braking systems, EBS, ABS, ADAS, and trailer control systems.

Why Choose Wabco?

• Wabco parts are known for lasting a long time, saving you money on repairs in the long run. • We have a huge selection of parts, covering many different makes and models of vehicles. • Our parts are made to meet or beat the quality of original equipment, so you can trust their performance. • Wabco offers great customer support to help you find the right parts and answer any questions you may have. Drive with confidence – choose Wabco parts at FixParts Online.