VEHICLE COOLING SYSTEM AND WIRE HARNESS COOLING STRUCTURE

A vehicle cooling system includes a wire harness WH electrically connected to a plurality of heat-exchange target electric devices, a J/B electrically connected to the wire harness and a high-voltage battery, electric device medium pipes routed along a routing path of the wire harness and used for circulation of a heat exchange medium through the heat-exchange target electric devices, and a path switching unit connected to the electric device medium pipes so that the heat exchange medium can be circulated, and configured to form a heat exchange medium path in which the heat exchange medium is circulated through the plurality of heat-exchange target electric devices. The path switching unit is provided in the J/B and forms the heat exchange medium path according to a heat generation state of the heat-exchange target electric devices.