What device is used to measure the battery voltage in a truck?

The multimeter is the device used to measure battery voltage in a truck. It is designed to measure various electrical parameters, including voltage, current, and resistance. When measuring battery voltage, the multimeter is set to the appropriate voltage range, allowing the user to obtain accurate readings of the battery’s condition. Understanding battery voltage is crucial for diagnosing electrical issues, ensuring the battery is functioning correctly, and maintaining overall vehicle performance.

Other options serve different purposes: a tachometer measures engine RPM, a speedometer indicates vehicle speed, and a pressure gauge is used for measuring pressures within a system, such as oil or coolant pressure. None of these instruments can assess the electrical voltage of a battery, highlighting why the multimeter is the appropriate tool for this task.