An Anti-Lock Braking System (ABS): Question An Anti-Lock Braking System (ABS): Answers Allows wheels to lock up. Prevents wheels from locking up. Makes it easier to turn a large vehicle. Assists with the operation of brake lights. Explanation The function of an Anti-Lock Braking System (ABS) is to prevent a vehicle's wheels from locking up during hard braking. This questions appears in the following tests: Alabama Tank Colorado Double Colorado Combination Georgia Double Georgia Combination Massachusetts Tank Massachusetts Combination Montana Combination New Hampshire Double New Jersey Combination Pennsylvania HazMat Pennsylvania Combination Pennsylvania Combination West Virginia Combination