The A/C fan is on the passenger side and should come on almost the instant the A/C is turned on. It is also the secondary engine cooling fan and should cycle on and off in relation to engine temperature, (If the A/C is OFF). Use a test light to probe the two wires on each fan. If you find power, the fan motor(s) is/are probably bad. Related searches for cooling fan wiring diagram 06 equinox cooling fan wiring diagramcooling fan wiring diagram autowiring diagram cooling fan relayelectric cooling fan wiring diagramradiator cooling fan wiring diagramwiring a cooling fanelectric cooling fan wiringac fan wiring diagram