Abs Diagnostics For Semi Trailers

The ABS light coming on may be normal functionality, or it can indicate a problem. When the key is inserted and the system is powered up, the ABS system should trigger the ABS light in the dashboard for a brief period. This indicates that the system has powered up and that there are no error conditions. In some trucks, the light may only come on when the trailer is first plugged in.

What causes a trailer ABS light to come on

However, if the system powers up and the light does not go off after a few seconds, it could indicate there is a problem with the brakes. This is also a likely case if the light ever comes on and stays on while driving. In cases like this, the system will need to be inspected and the problem diagnosed.

What is the most common problem with ABS systems

ABS systems are subjected to incredible amounts of dirt and debris. This can cause poor connections from the pins in the plug, which will result in inconsistent power and unpredictable operation. Another very common ABS problem is the module itself. The module is the part of the ABS that processes the braking conditions constantly, as well as conditions supplied by speed and wheel sensors. This module can become damaged by debris created by the braking process.

• ABS System Diagnostics
• Sensor and Wiring Inspection
• ABS Control Module Testing
• Brake Line and Valve Inspection

Depending on what repair work your truck or trailer needs, the price can fluctuate considerably. For minor problems that can be solved with cleaning, you may only spend $100 – $200. However, if the problems point to the ABS module needing to be replaced, that could cost $1,000 or more depending on the module that your truck needs.