Possible reasons that the car starts, but all the electrics do not work:
1. Defective battery:
* A weak or discharged battery may not provide enough power to run the electrical system.
* Check the battery terminals for corrosion or looseness.
* Charge or replace the battery if necessary.
2. Faulty generator:
* The generator is responsible for charging the battery and powering the electrical systems while the engine is running.
* Check the alternator belts for wear or looseness.
* Conduct a load test on the generator to determine its health.
3. Faulty wiring or fuses:
*Damaged or corroded wires may cut off power to electrical components.
* Check wiring for visible damage or signs of corrosion.
* Check fuses and replace blown ones.
4. Faulty main power switch:
* The main power switch connects the battery to the vehicle’s electrical systems.
* Check the switch for corrosion or looseness.
* Make sure the switch is in the correct position (on).
5. Faulty engine control module (ECU):
* The ECU controls the various electrical systems of the vehicle.
* A trouble code reader (OBD-II) can help identify ECU problems.
6. Malfunction in the ignition system:
* Ignition system problems, such as a faulty distributor or spark plugs, can affect electrical performance.
* Check the ignition system for wear or damage.
7. Malfunction in the charging system:
* In addition to the alternator, the charging system includes a voltage regulator, charging relay and drive belt.
* Check these components for faults or signs of wear.
How to troubleshoot:
*Check the reasons listed above one by one.
*Start by checking the battery and alternator as these are the most common causes of electrical problems.
* Use a voltmeter to measure the voltage at the battery and alternator terminals.
* If any components are found to be defective, replace them.