How to Determine Automotive Circuit Faults?

[VanEvangeline]

Automotive circuit fault diagnosis methods are as follows: 1. Sound detection method involves checking faults by listening to the instantaneous operational sounds of certain electrical assemblies. 2. Test lamp inspection method - With increasing electronic devices in modern vehicles, the traditional spark test method should be abandoned in favor of test lamp inspection. 3. Short-circuit inspection method involves directly powering electrical components with wires. For example, if the starter doesn't rotate, you can short-circuit the 'battery' terminal and 'starter' terminal of the starter relay with a wire. 4. Sectional inspection method: For faults in certain long circuits of vehicles, divide the circuit into sections and use the 'test lamp inspection' method to locate the faulty section.