That depends on which motor you have in your truck. Most vehicles will require a mechanic to hook a computer up to the truck and get the fault codes that way. Detroit Diesel has a feature where you can read the fault codes on the dash, but you'd still need to contact a mechanic to find out exactly what the fault codes given mean. Although the ABS is a separate system from the drivetrain, all the sensors input into the engine computer, and are read from that.
In many cases, you'll get an ABS warning when there's nothing wrong with the ABS at all, but instead, it'll be because of damage to one of the ABS sensors.
Because there's either a problem with your trailer's ABS system, there's a fault in the wiring, or there's bad wheel speed sensor.
The ABS light is on because there is a fault in the system. Once the fault is repaired or fixed the light will reset itself. The ABS system can be scanned for codes to help diagnose the problem.
There is a problem with the system. Have this looked at by a professional.
Fix the fault in the ABS system
it sounds like the abs sensor is faulty ive been told that abs sensors is a common fault on the vectra. find a garage that compter tests the abs system
ABS System & Fault Findinghttp://www.fordscorpio.co.uk/abssystem.htm
The ABS system self tests itself every time you turn on the ignition. If there is a fault the light will illuminate. Repair the fault and the ABS system will test itself and reset the light if everything is good.
The fault code FF77 typically indicates a fault with the ABS hydraulic unit or the ABS control module in a 1994 Jaguar XJS. It is recommended to have the ABS system diagnosed and repaired by a qualified technician to ensure the system is functioning properly.
Anti-lock Breaking System
When your truck loses power, the ABS system loses power.
It means you have a fault on your Anti-lock Braking System
The abs light stays on when a malfunction has been detected in the antilock braking system. The abs computer will have stored fault codes.