Question What color malfunction lamps do vehicles equipped with ABS have? Answers Green Yellow Blue Explanation Anti-Lock Braking System (ABS) malfunction lamps are usually yellow. Even if the ABS isn't working properly, a driver will still have access to the vehicle's usual braking functions. This questions appears in the following tests: Alaska Air Brakes Alaska Air Brakes Louisiana Class B Knowledge Test Oklahoma Air Brakes Vermont Air Brakes