What are the representative letters for automotive wire colors?
2 Answers
Automotive wire colors are represented by the following letters: Black (B), Green (G), Light Green (LG), Blue (L), Light Blue (SB), Violet (VI), White (W), Yellow (Y), Orange (O), Pink (P), Red (R), Gray (GR). Below are specific details about automotive wiring: 1. Specifications: Common wire specifications in automotive wiring harnesses include nominal cross-sectional areas of 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 4.0, and 6.0 square millimeters, each with its own allowable current load value, suitable for wires used in electrical equipment of different power ratings. 2. Layout: Wiring harnesses should be routed along edges and grooves (designed wiring channels on the vehicle body) to avoid direct pressure on the harness. No exposed wiring harnesses are allowed in the cabin. In visible locations such as the engine compartment, prominent attraction points or conspicuous colors should be set up, and the wiring harnesses installed here should not protrude or be conspicuous.
When I first started learning car repair, I always found those various wires too troublesome. Later, I realized that different colors correspond to fixed letter codes, designed to help you distinguish functions at a glance. Red wires are usually coded as R, representing the positive or power line, such as the battery connection; black wires coded as B are the ground or negative lines, conveniently connected to the car body to avoid short circuits; white wires W are signal or sensor lines, yellow wires Y are often used for light controls, and blue wires BL are commonly found in interior lighting or audio systems. These codes actually originate from European and American industrial standards, simplifying installation and maintenance. Beginners should remember to check the manual before modifying circuits and avoid random connections to prevent battery sparks. I once ignored the colors myself and ended up blowing a fuse.