Contents of a car electrical diagram
General designations
* Battery
* Starter
* Generator
* Electronic control unit (ECU)
* Fuse
* Relay
Engine compartment
* Main fuse box
* Starter and charging system
* Cooling system
* Lighting fixtures
Salon
*Dashboard
* Heating, ventilation and air conditioning (HVAC) system
* Audio system
* Electric windows
* Central locking
Body
* Lighting
* Signals
* Windshield wipers and washers
*Door locks and trunk
* Anti-theft system
Wiring diagram
Note: Wiring diagrams may vary depending on vehicle make and model. Always consult your vehicle’s owner’s manual for accurate information.
Typical wiring diagram
[Scheme]
Decoding the scheme
* Thick lines: Main power rails
* Thin lines: Conductors
* Circles: Grounding points
* Squares: Fuses
* Triangles: Relay
* Letter designations: Components
Example circuit
[Diagram: lighting system]
Decoding the scheme
*A: Battery
*B: Headlight switch
*C: Headlights
*D: Side lights
*E: Headlight relay
*F: Headlight fuse
Using a car electrical diagram
* For troubleshooting
* For upgrading or repairing the electrical system
* To understand the operating principles of the electrical system
* To ensure safety when working with electrical components
Warnings
*Always disconnect the negative terminal of the battery before working on the electrical system.
* Use caution when working with high voltages.
* If you are not confident in your abilities, entrust the work to a qualified specialist.