If an Anti-Locking Braking System (ABS) is not working on a truck:

An Anti-Lock Braking System (ABS) is in place as an addition to a braking system. It intervenes to prevent brakes from locking up during hard braking. If ABS is not working, the basic braking functions on a vehicle will still remain, so the driver can continue to drive and brake normally.

Wait, before you go

Ace Your Alaska CDL Written Test with our Guaranteed Cheat Sheet