P1673 Isuzu Cooling Fan Relay Circuit Malfunction
Possible causes
– Faulty cooling fan relay
– Cooling fan relay harness is open or shorted
– Cooling fan relay circuit poor electrical connection
– Cooling fan relay harness is open or shorted
– Cooling fan relay circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Radiator fan inoperative
– Engine overheating
– Radiator fan inoperative
– Engine overheating
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