Abstract: with the electronic technology in the car on the widespread application， car diagram has become a car maintenance personnel the necessary technical At present， most of the cars were armed with more electronic control device， the high technical content， circuit complex， so difficult to Correct circuit diagram with cars， also need to certain A circuit diagram is to know the car type electrical system work with important information， understanding of the types and characteristics of car circuit， the characteristics and the mid of circuit express way， the system of the circuit to read method， rules and skills， correct guidance readers how to read， use a circuit diagram is very important The coil car circuits made of parallel connection circuit， this is from the overall perspective， in local circuit still have series， parallel and parallel-series The car circuit actually all was by all sorts of circuit and a stack， each circuit can be independent placed out， change complex for According to the basic purpose of whole vehicle circuit can be divided into the light， signal， instrument， start， ignition， charging， auxiliary circuits， Each circuit has his own load conductors and control switch fuse box or
