Which agent is typically used for testing electrical continuity in a vehicle?

A multimeter is commonly used for testing electrical continuity in a vehicle because it can measure resistance, voltage, and current. When checking for continuity, the multimeter is set to the resistance (ohm) setting. If the circuit is complete, the multimeter will show a low resistance value, often close to zero; this indicates that electricity can flow through the circuit. A good multimeter can also provide audible signals, making it easier to identify continuity without needing to read the display.

While an ammeter is designed to measure current flow in a circuit, it cannot directly indicate continuity; it requires a circuit to be active. A voltmeter measures the voltage across components but does not provide information about whether a path is complete. A pressure gauge is unrelated, as it measures pressure in fluids and is not applicable for electrical testing. The multimeter's versatility and functionality make it the ideal choice for checking continuity, differentiating it from the other instruments listed.