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There are no relays in this circuit. The PCm controls the cooling fan via sending a signal to the fan module. The wire shown in the diagram below is most likely chaffed and grounded and needs to be ohm tested to ground when disconnected at both ends. If the wire is fine then fault is internal inside the PCM.
Earlier I explained you need to unplug the connectors at both ends on the wire to be tested which is at the fan and PCM. The PCM is the vehicles computer. I assume you know where the PCM plugs in since you stated you did this test but just do not know where the actual PCM is located. Its sunk into the firewall on the passenger side of the engine compartment. See below
I took the vehicle into the shop so they could replace the PCM. When they tested the PCM they said it was OK and they rechecked the wire to make sure no ground. The diagnostics test said it was a bad fan module so I replaced the fan module again. Just finished and as soon as I plugged it in the fan started up. When I turned the ignition on the fan stopped. When I started the motor the fan came back on at a slow speed. When I turn off the car the fan starts up again slow and then turns on to high speed and won't stop??
here it is