Radiator fan will not run on 2016 3.6L JKU sport with no engine or electrical modific
I purchased my Jeep 1 year ago and have had no problems. Went to start one afternoon and starter engaged but engine did not turn over. After jumping the Jeep and testing the battery, identified a bad battery. While removing the battery for replacement it started sparking and drawing a current through the cable to the starter, melting the fusible link.
I removed the battery and fusible link to the starter. I searched for any additional damaged wires or any potential grounds, did not find any. I installed a new battery and new fusible link to the starter. Jeep starts with no issues, battery voltage is approximately 12.5 volts when engine is off, and approximately 13.5 volts with engine running. I think that problem is solved, caused by failed battery.
Now the electric radiator cooling fan does not start/run. I scan for codes and receive P0480 “cooling fan 1 ctrl circ open (low speed fan)”, clear the code and do not receive again while operating. I disconnect the fan motor connection behind the power steering reservoir and check continuity from the battery terminal to the connection and appears good. I checked the ground wire which terminates behind the power steering fluid reservoir and it looks intact and continuity from the fan motor connection to the ground tests good. Being uncertain, I replace the fusible link from the battery terminal to the cooling fan, check continuity again and still good. I swapped the F11 “radiator fan” relay with another relay from the TIPM, and checked every fuse in the TIPM. I repeatedly check for engine codes, and do not receive any, until I run the engine with the cooling fan disconnected. Receive codes P0480 “cooling fan 1 ctrl circ open (low speed fan)” and P0693 “fan 2 ctrl circ low”. After connecting the fan and clearing codes, no codes reappear.
I have had to drive the Jeep on short runs, while observing engine coolant temp from the dash digital meter, dash digital readout, and through my superchips. All three track with each other and indicate the temperature sensor is operating.
I think that the failure is the radiator fan, but am very hesitant to say yes because of the $400 investment. Is there anything I could still be missing, or a way to test the fan and verify it is bad.
I also considered a failure the TIPM, however have not observed any other electrical malfunctions. Is there any other checks I can perform on the TIPM.
Mahalo for you help.