ELECTRIC POWER SUPPLYING DEVICE FOR VEHICLE

PROBLEM TO BE SOLVED: To reduce influence on the other control modules by connecting together an electric power source, a plurality of outfit system control modules connected to the power source through a power line through a power line different from the power line, and providing an engine control system controlling the driving source of a vehicle. SOLUTION: A battery 1 is connected to an engine control system(ECS) 8 through a power line 25, and electric power is supplied from the battery 1 to it. For power supply to the ECS 8 essentially controlling the engine, the power line 25 independent of a loop-like power line 30 is used. Consequently, even if the outfit system control modules such as a BCM 3 and a FIM 7 are broken down, when the ECS 8 controlling the engine can normally function, the automobile can be carried in a repair shop for repairing the troubled part. Namely, influence of mutual control modules can be reduced.