Abs Light On Semi Trailer

The system functions with the air brake system that is found in heavy duty trailers abs ensures that wheels maintain their contact with the ground when the driver applies the braking system.

Abs light on semi trailer. The key part of semi trailer. Trailer abs systems contain an on board computer with self testing and diagnostic capabilities. I have never seen the light come on while turning the key. Everytime i drive over anything that s a bump my abs light for the trailer goes on and doesn t go away for minutes one time it stayed on for about 30 minutes.

I know at least 1 pin on the trailer electrical connector is dedicated to abs module power but i am not sure how exactly the abs light gets illuminated via a trailer abs fault. A sensor at each wheel monitors wheel speed. The light only comes on when there is a problem with the trailer abs. We have some newer stoughton and wabash trailers that have the abs light on the rear corner of the trailer on the driver side.

If you understand how the abs system works on tractor trailer units it makes it a lot easier to find and fix faults. The anti lock braking system abs in a big truck is very similar to those in most vehicles. During hard braking the wheel sensor controls the braking action to prevent wheel lockup. The abs status light comes on for 3 to 5 seconds and you might hear the air valves chuffing.

According to the manufacturer the trailer abs light will only come on and stay on when. Anti lock braking system abs is an electronic safety system that controls and monitors wheel speed when brakes are applied. During startup when the auxiliary circuit is first powered the abs runs a self check. Can someone please tell me why the abs light on my dash keeps coming on for the trailer.

It is also known as an anti skid braking system. Abs issue doesn t prevent you from driving but that is a big safety conce. By pressing 6 times on brakes to reset abs sensor works for both truck and trailer. I ve never really had this problem until i got a trailer manufactured in 2007.

August 29 2013 at 1 29 pm 541263.