Steve, relay for the radiator fan is in the top left corner in the diagram at post #16 in this thread. Power for the fan comes from the 50 amp fuse 15 in the Power Distribution Center (same diagram). There is no fuse for the radiator fan in the junction block at the left end of the dash. According to the FSM, the radiator fan should run any time the a/c is selected, or if coolant temperature exceeds 217° or 230° (FSM shows two different values in different places). Wire carrying power to the fan is light green.