Battery problems
*Unable to start the car
* Weak headlights or failure of electrical appliances
* Sulfur smell or hissing
*Corrosion or oxidation of battery terminals
Problems with the generator
* The battery light on the dashboard is on or flashing
* Headlights or other electrical devices dim when the engine is running
* Generator noise or vibration
* Current leakage from the generator
Starter problems
*Starter does not rotate
*Starter rotates slowly
*A grinding or clicking sound is heard when starting up
* Starter engages but does not start engine
Wiring problems
* Broken wires or poor connections
*Short circuit
* Insulation damage
*Burning fuses
Electronics problems
* Malfunction of control modules (ECU)
* Problems with sensors
*Corrosion or oxidation of contacts
* Faulty relays and switches
Lighting problems
* Lamp burnout
*Lighting relay malfunction
* Faulty wires or connections
*Corrosion or oxidation of contacts
Other electrical problems
* Malfunctions of the anti-theft alarm
* Problems with power windows
* Malfunctions in heating and ventilation
* Malfunctions in the operation of windshield wipers
* Interference in radio or other audio systems
Possible reasons
* Aging and wear of components
* Corrosion and oxidation
* Electrical overload
* Incorrect operation of the vehicle
* Mechanical damage