Wabco 4491721200 Power Supply Cable

Description

The Wabco 4491721200 Power Supply Cable is a critical component within trailer air brake systems, specifically designed for EBS applications. It's used to provide the power supply connection for semi-trailers. This cable features a Socket ISO 7638 7-pin connection on one end and a Power 7-pin connection on the other, ensuring a reliable power feed to the trailer's braking system. Its dimensions are 88 x 405 x 409 mm, and it adheres to OE specifications for optimal performance and compatibility, delivering a robust and dependable connection for enhanced safety and control.

Key Features & Benefits

This cable’s job is pretty straightforward – it delivers electrical power from your truck’s system to the trailer brake controller. It provides the juice that allows the controller to actually do its work – activate the brakes on your trailer. It has a main power wire, and usually a ground, so it creates that electrical circuit. Some also include a memory wire to keep the controller settings even when the truck is off. Think of your truck’s electrical system as the heart, and the brake controller as a muscle. This cable is like a major artery, getting the energy where it needs to go. It connects directly from your truck’s power source – usually a fuse block or battery – right to the brake controller unit itself. Without it, the controller is just a box. It's part of the whole system that lets you safely and effectively control your trailer’s brakes from inside the cab.

Symptoms, Risks & Replacements

It's hugely important. If this cable fails, your trailer brake controller won’t get power. You’ll notice if it goes bad, because your controller will just be dead – no lights, no function. That means no control over your trailer brakes, which is a serious safety issue. It’s a relatively small part, but a critical one. A faulty connection or broken wire can leave you with no trailer braking ability, and that’s not something you want to mess with. You can find replacements pretty easily, places like Fixparts Online carry a good selection, and it's often something a reasonably handy person can replace themselves. Just be sure to disconnect the battery before you start working with any electrical components.

Warranty Information

Wabco Power Supply Cable (MPN 4491721200) comes with a 1-year warranty.