Depends on the year of the truck. the best way is to get a scan tool or take it to someone who has one. If your abs light is on and the truck has hydraulic lines that run along with the ABS harness then it has probably rubbed a hole in the harness. the harness would need to be repaired. A good scan tool will pin-point a sensor that isn't working. Check for rust on the exciter ring, if its rusty then theres a good chance its the exciter ring and not the sensor.
You need the have the abs codes checked. You can then diagnose and repair the cause.
You need to have the abs checked for codes. Then you can diagnose cause.
If the abs and check engine lights are on there is a problem. Both computers should have codes stored in there memories. Have the codes read. You can then diagnose the cause.
have the abs system check
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.
It means you now have REGULAR brakes and no ABS functions. You would have to extract the codes to see what exactly WHY your ABS is not functioning. That extraction process varies from maker to maker as its not standardized.
You need to have the engine and abs checked for codes.
Usually it means there is a problem with the anti-lock braking system, take it to a mechanic and have them check the abs codes as well as the engine codes just in case there is a code in the computer relating to the abs system.
Most code scanners that you can purchase for home use do not include the ability to read ABS trouble codes. You will need to find a code scanner that can read the ABS codes.
You can get ABS codes for your Volvo at your local Volvo dealership. You can also find the ABS codes in most Volvo service manuals.
The system needs checked for codes. It will show a malfunction.
abs codes are retreved by juming obd2 terminal 4-12 after codes plump brake petal 6 times