If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can:

Question

If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can check under the trailer for wheel speed sensors coming from the back of the brakes.

Accepted Answer

Check for wheel speed sensors coming from the back of the brakes.

Answer

Look for a red light on the front right corner of the converter dolly.

Answer

Pump the air brakes to activate the ABS.

Answer

Assume the vehicle has ABS.