Diagnosis of VAZ electrical wiring faults
* Check fuses and replace blown ones.
* Inspect connectors and terminals for corrosion, looseness or damage.
* Check the wiring harnesses for damage, kinks or chafing.
* Use a continuity tester or oscilloscope to check the continuity of wires and components.
* Check the voltage and current in the circuit using a voltmeter and ammeter.
Lighting circuit repair
* Replace burnt out lamps.
* Check and clean the contacts in the lamp sockets.
* Inspect and replace light switches if necessary.
* Check and repair the wiring connecting the switches and lamps.
Ignition circuit repair
* Replace faulty spark plugs.
* Check and adjust the gap between the spark plug electrodes.
* Inspect and replace high voltage wires if necessary.
* Check and replace the ignition module if necessary.
Engine control circuit repair
* Check and clean the engine control sensors (mass air flow sensor, mass air flow sensor, DPKV, etc.).
* Inspect and replace the Electronic Control Unit (ECU) if necessary.
* Check and adjust idle speed settings.
Repair of power supply circuits
* Check the battery and recharge or replace it if necessary.
* Inspect and clean battery terminals and connections.
* Check and repair the wiring connecting the battery to the alternator and starter.
* Check and replace the generator if necessary.
* Check and, if necessary, replace the generator voltage regulator.
Repair of fuel injection system circuits
* Check and clean the fine fuel filter.
* Inspect and replace the fuel pump if necessary.
* Check and adjust fuel pressure.
* Inspect and replace injectors if necessary.
Tools and materials for repairing VAZ electrical wiring
* Voltage tester
* Continuity tester
* Oscilloscope
* Voltmeter
* Ammeter
* Tool set (screwdrivers, wrenches)
* Electrical tape
* Corrugated tubes
* Contact cleaning solvent
* Heat shrink tubing