Which tool helps diagnose electrical problems in an engine?

The multimeter is an essential tool for diagnosing electrical problems in an engine because it is designed to measure voltage, current, and resistance. This versatility allows mechanics to assess various electrical components and their functionality. For instance, by measuring voltage, a technician can determine if there’s sufficient power reaching different parts of the ignition system or sensors. Current measurements can help identify issues like shorts or open circuits, while resistance testing can pinpoint faulty connections or components, such as coils or wires.

While a voltmeter is specifically used for measuring voltage, it does not measure current or resistance, limiting its diagnostic capabilities. A wrench is primarily a tool for mechanical tasks such as tightening bolts, and an oil pressure gauge is used for monitoring oil pressure, making them unsuitable for diagnosing electrical issues. Hence, the multimeter stands out as the most comprehensive tool for troubleshooting electrical problems in automotive engines.