Patent ID: 8097974

Claim:
A vehicular electric power source controller that controls electrification of an electrical load mounted in a vehicle, the vehicular electric power source controller comprising: an operation input device that is located in a vehicle cabin, and that accepts an operation input from a user; a first electrical load mounted in the vehicle; a second electrical load that is electrified preferentially over the first electrical load when the vehicle is parked; a first switching device; a second switching device; a first electrical switching element that switches the electrification of the first electrical load; and a second electrical switching element that switches the electrification of the second electrical load, wherein switching by the first switching device is performed based on a first control signal from the operation input device, and when the first control signal from the operation input device is detected, the first switching device commands to electrify the first electrical switching element and the second electrical switching element to switch the electrification of the first electrical load and the electrification of the second electrical load; and switching by the second switching device is performed based on a second control signal from a terminal device that wirelessly communicates with the vehicle, and when the second control signal from the terminal device is received, the second switching device commands to electrify only the second electrical switching element to switch the electrification of only the second electrical load, and the second switching device includes a prohibition device that prohibits electrification of the first electrical load by the first electrical switching element.