Visual inspection
* Check the integrity of wires, connectors and terminals.
* Check for corrosion, dirt or loose connections.
* Check for damaged insulation or burnt wires.
Electrical testing
* Voltmeter: Used to check the voltage on various vehicle components such as battery, alternator and fuses.
* Ohmmeter: Measures resistance in electrical circuits, which helps identify opens or short circuits.
* OBD scanner: Connects to the vehicle’s on-board computer and allows you to read and erase fault codes, as well as receive data in real time.
Checking individual components
* Battery: Check the voltage and capacity, and clean the terminals for corrosion.
* Alternator: Check the charging voltage and current to ensure it is working properly.
* Starter: Check the ability of the starter to start the engine.
* Lights: Check the operation of the headlights, taillights, turn signals and interior lighting.
* Fuses and relays: Check the integrity of the fuses and the serviceability of the relay.
Diagnosis of specific problems
* Starting problems: Check battery, starter, ignition and fuel system.
* Charging problems: Check alternator, battery and wiring.
* Lighting problems: Check bulbs, fuses, relays and wiring.
* Electrical faults: Check for possible short circuits, breaks or faulty components.
* Electronics Problems: Use an OBD scanner to read and erase trouble codes and obtain vehicle health data.
Adviсe
* Observe safety precautions when working with car electrical equipment.
* Use the correct diagnostic tools and equipment.
*Refer to your vehicle repair manual for specific instructions.
* If necessary, contact a qualified auto mechanic.