Visual inspection
* Check the battery: Make sure the battery is clean and well secured. Check the terminals for corrosion or damage.
* Check wiring: Inspect wiring harnesses for damage, kinks, or exposed areas. Look for signs of burning or melting.
* Check the lighting: Turn on the headlights, side lights, turn signals, brake lights and hazard lights. Make sure they are all working properly.
* Check your windshield wipers: Make sure your windshield wipers are in good condition and working efficiently.
Electrical tests
* Check battery voltage: Use a voltmeter to check battery voltage with the engine off and running. It should be between 12.6-14.4 V.
* Check the charging system: Using a voltmeter, measure the alternator voltage with the engine running. It should be around 13.8-14.5 V.
* Check the starter: Try to start the car. Listen for any unusual sounds or smells.
* Check the ignition system: Use a spark tester to check if there is spark at the spark plugs.
*System Scanner Scan: Connect an OBD2 scanner to the vehicle to read any fault codes related to the electrical system.
Additional Tips
*Use a voltage tester or multimeter to check electrical components.
* Inspect fuses and relays for burnout or damage.
* Checking the correct operation of sensors and switches.
* Checking the grounding of components to the car body.
*If you find any problems, contact a qualified mechanic for further diagnosis and repair.