Possible reasons why all the electrics in the car do not work, but the car starts:
1. Faulty battery relay:
* The battery relay connects the battery to the vehicle’s electrical system.
*A faulty relay can cause power outages.
2. Faulty generator:
* The generator produces electricity that powers the vehicle’s electrical system while the engine is running.
*A faulty alternator can drain the battery and cause all electrical components to fail.
3. Discharged or faulty battery:
* The battery provides the initial impulse to start the engine and maintains the electrical system when the engine is not running.
*A dead or faulty battery can cause all electrical components to fail.
4. Damaged or loose ground wire:
* The ground wire connects the negative terminal of the battery to the vehicle chassis.
*A damaged or loose ground wire can disrupt the electrical circuit.
5. Faulty main switch:
* The main switch is a safety device that shuts down the entire electrical system in the event of a short circuit.
* A faulty main switch can cause all electrical failure.
6. Faulty engine control unit (ECU):
* The ECU is the computer that controls almost all of the vehicle’s electrical components.
* A faulty ECU can cause the entire electrical system to fail.
Diagnostic steps:
* Check the battery for power and voltage.
* Check the battery relay and alternator for faults.
* Check the ground wire and main switch.
*Check the ECU for fault codes.
If you cannot diagnose the problem yourself, contact a qualified mechanic.