Common symbols for vehicle circuits 10 IN Introduction IN-R Symbol Meaning Symbol Meaning Battery y Generate electric current through chemical reaction y Provide direct current to circuit (1) y If current flows from the positive electrode to the negative electrode of the battery, the connection between the connecting point and the body or other grounding wire is as follows. y Grounding (1) indicates that the grounding point is connected to the grounding body through the harness. y Grounding (2) indicates that the grounding point (i.e., the component) is directly connected to the grounding body. y Grounding (3) indicates that the wire is connected to the grounding body. Remark:
y If the grounding is faulty, the current will be unable to flow in a loop. Lamp y It glows and generates heat when current flows through the filament. Grounding (1) Grounding (2) Resistor y Resistor with constant resistance. y It protects the electrical components in the circuit by maintaining the rated voltage. Grounding (3) Electric motor y Convert electrical energy into mechanical energy. Fuse y When the current exceeds the current specified by the circuit, the fuse will blow. Remark: y It is not allowed to use a fuse with a capacity exceeding the specified capacity for replacement. connection> Pump y Machinery that sucks and discharges fluids.
Cigar lighter y Resistive coils that generate heat. Fuse (suitable for high-current fuse) fusible connection Accessory socket y Internal power supply Horn y It makes a sound when there is an electric current. Heater y Heat is generated when current flows through it. Speaker Light-emitting diode (LED) y When current flows, the diode can emit light Cathode Cathode (A) (K) Cathode (K) Anode (A) Direction of current flow