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In front of the wiring harness in advance to draw harness map, wiring harness and circuit schematic is not the same. The circuit schematic is an image representing the relationship between the electrical parts, which does not reflect how the electrical pieces are connected to each other, regardless of the size of each electrical element and the distance between them. And the wiring pattern must take into account the size of each electrical components and the distance between them, wiring harness welding should also reflect the electrical parts are connected between each other.
Automotive wiring harness welding within the common specifications of the nominal cross-sectional area of 0.5,0.75,1.0,1.5,2.0,2.5,4.0,6.0 square millimeter of the wire (Japanese cars commonly used in the nominal cross-sectional area of 0.5,0.85,1.25, 2.0,2.5,4.0,6.0 square millimeters), each of which has a permissible load current value and is used for wires of different power equipment. The specification line is suitable for the lamp, light, front and rear lights, brake lights, etc .; 1.0 specification line for turning lights, fog Lights, etc .; 1.5 specifications for headlights, speakers, etc .; main power lines such as generator armature line, ground wire and other requirements 2.5 to 4 square millimeters of wire. This is only refers to the general car, the key depends on the maximum load current value, such as battery grounding line, the positive power cord is a dedicated car wire alone, their diameter is relatively large, at least a dozen square millimeters Above, these "giant" wire will not be included in the main harness.
