What does a multimeter measure to help identify issues in electrical circuits?

A multimeter is a versatile instrument that measures several crucial electrical parameters, particularly voltage and current. By measuring voltage, a technician can determine if there is an adequate amount of electrical potential across components in a circuit. This helps in identifying poor connections, shorts, or other issues that could hinder the proper operation of electrical systems in a vehicle.

When measuring current, a multimeter can help diagnose issues such as excessive draw from components or circuits, which can lead to failures or burnout of electrical parts. Both voltage and current readings are essential for troubleshooting and understanding the behavior of electrical circuits, making them fundamental measurements for effective diagnostics in automotive electronics.

Other options do not align with the primary functions of a multimeter. While resistance and capacitance are important measurements, they're not as crucial as voltage and current for troubleshooting real-time automotive electrical issues. Torque and speed pertain to mechanical systems, while flow rate and pressure are relevant in fluid dynamics rather than electrical measurements.