Question When starting an engine, warning lights and buzzers should: Answers Turn on and stay on. Flicker occasionally. Turn off right away. Explanation After starting a vehicle's engine, the warning lights and buzzers for oil, coolant, charging circuits, and the Anti-Lock Braking System (ABS) should go out right away. Take a FREE Practice Test Now This questions appears in the following tests: South Dakota Knowledge Test Class A , Alaska Knowledge Test Class B , Missouri Tank , South Carolina Tank ,