VEHICLE COOLING SYSTEM AND WIRE HARNESS COOLING STRUCTURE

A vehicle cooling system (1) includes a wire harness (WH) electrically connected to a plurality of heat-exchange target electric devices, an electrical junction box (110) electrically connected to the wire harness and a high-voltage battery (112), electric device medium pipes routed along a routing path of the wire harness and used for circulation of a heat exchange medium (R) through the heat-exchange target electric devices, and a path switching unit (113) connected to the electric device medium pipes so that the heat exchange medium (R) can be circulated, and configured to form a heat exchange medium path (104) in which the heat exchange medium is circulated through the plurality of heat-exchange target electric devices. The path switching unit (113) is provided in the electrical junction box (110) and forms the heat exchange medium path (104) according to a heat generation state of the heat-exchange target electric devices.