Which component is NOT checked during a pump test?

Answer: D — Engine light indicators

The engine light indicators are not part of the standard checks performed during a pump test. A pump test primarily focuses on evaluating the pump’s performance, which includes checking the hydraulic fluid levels to ensure proper operation, confirming the water supply connection to make sure it is adequate for the test, and measuring the pressure output to assess the pump's efficiency and capability to deliver water at a specified pressure. While the engine light indicators are important for overall vehicle operation, they are not directly related to the pump's function during a pump test. Therefore, they are not typically included in the checks performed in this context, as the test concentrates on the hydraulic system and pump performance rather than the engine status.