Recent years have seen an explosion in the use of electronics in cars. Electronic systems now fill numerous safety, performance, and passenger-convenience roles, and because automakers offer many such systems as buyer options, the EDS (electrical-distribution system) in a vehicle platform must now contend with an avalanche of configurations. Think of the EDS as the nervous system that interconnects thousands of device pins using kilometers of wire to carry signals from sensors to actuators and their various controllers. Optional content requires adding or subtracting subsystems, and these changes impact the quantity, routing, and types of signals or power/ground to accommodate.
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