A multimeter is a versatile electronic measuring device used to test voltage, current, resistance, and continuity in a vehicle’s electrical system. It helps diagnose battery issues, faulty wiring, sensor failures, or alternator problems. Ideal for both beginners and experienced technicians, a digital multimeter provides accurate readings with easy-to-read displays. To use, select the correct setting, connect the probes to the circuit, and interpret the results. Regular testing with a multimeter can prevent unexpected breakdowns by identifying electrical faults early. It’s an essential tool for anyone performing DIY automotive repairs or routine maintenance, offering confidence and clarity in troubleshooting.