Motors run and the PCM has been swapped with two others and get the same ODB code. Relays have all been checked and are good. Would anything in the motors or the RF filters on the motors cause it to think fan control 2 circuit is open? High pressure switch on the AC compressor is new. Low pressure switch is still the original and continuity between the two and back to the PCM checks out. PCM flips the relay turning both fans on three to five seconds after the motor is started. I have also checked wiring and fuses all the way through from the pressure switches, AC clutch relay, fan relay, PDC fuses, through to the dash fuses, connectors and to the HVAC controls on the dash using the Dodge shop manual circuit diagrams. Totally stumped. Also, the coolant sensor is new, swapped it upfront and checked its wiring expecting it to be in fail mode and running the fans. Also traced the grounds from the fans and other circuits to their ground points and continuity everywhere.
Thursday, August 16th, 2018 AT 5:01 PM