cooling fan

  1. R

    P0481 Help...

    I've got ECL with P0481 & P0694 codes. P0481- Cooling Fan 2 Control Circuit Malfunction P0694 - Fan 2 Control Circuit High I've checked the wiring, it's good. Changed Relay at Grill, no change. Replaced the Cooling Fan, now the fan won't even come on. It did with the Original but still the...
  2. E

    2015 Ram PWM Cooling Fan Running High Speed after Engine Startup

    Hello, so I have a 2015 Ram 1500 with the 3.0 diesel engine. The cooling fan runs wide open after a few seconds of engine startup. I still have good readings for the oil and coolant temps. Plugged in Alpha OBD and live data shows ECM commanding 57% output to the cooling fan. Signal wire from fan...
  3. J

    Cooling fan rapid fast cycling

    Fan comes on but does not have enough time to do any cooling. Off 8sec, on 4 sec, off 8sec, on 4 sec ………. Continues all during idiling. Not during driving. Not during coasting. We also discovered today if the AC IG off and the interior heat is turned on too high it continues fast cycling. The...
  4. StruggleBus

    Fan Clutch Engaging With AC on

    So, I've got a 2022 Ram 2500 Limited with a 6.7 in it and about 1200 miles. Since day 1 it Seems like when the A/C in on the fan clutch will be on a lot. Dealer says everything is operating fine but the other day a coworker got his 2022 2500 (same truck as me but red) and his fan doesn't come...
  5. J

    Auxiliary Pusher Fan for long Idle (K9 + AC)

    Hello All, From what I have read these trucks (2016 Ram 2500 5.7L Crew Long bed 4x4 SLT) have adequate cooling at idle. However I am planning on running this for extended periods which I have been told on a few different forums (non Ram) that is a bad idea. I have a Search and Rescue K9 that...
    • jonhimes
    • Thread
    • a/c ac blower fan bad cooling fan dog idea idle k-9 safe search and rescue
    • Replies: 11
    • Forum: Heavy Duty
  6. 4

    Cooling fan clutch voltage question

    Good afternoon, I am new to the group and came here hoping to find some help with a fan clutch issue. I was recently pulling a trailer when my water pump pulley broke off and took out my serpentine belt, crankshaft position sensor, and the wiring to my radiator fan clutch. Since then I have...
  7. Jerm317

    PO481 code/check engine light comes on every time it rains and it turns off when everything is dry.

    I have a 2012 Bighorn 4door 5.7 Hemi 4x4 with about 105,000 miles on her , so keep having a check engine light / PO481 code coming on when every it rains and says on for a day or two sometimes less sometimes more and then turn off , PO481 code is for a relay for cooling fan #2 I have replaced...
  8. marksuman1

    Help Needed. P0480 Error...No Relays?

    New here and needing help with my 2017 1500 Big Horn 3.6L. Engine is overheating and I'm getting a P0480 error saying the Cooling Fan 1 Control Circuit is failing. Went to check fuses/relays but they're missing from the fuse box. Never had any issues before so I'm not sure if it came that...
  9. Ellis32198

    Engine Cooling Fan Runs Excessively

    Hi. I'm new to the forum and haven't posted anything until now. Any assistance with this would be greatly appreciated. An issue has just started with the cooling fan running way too long, far past the normal 15-20 seconds at first start up. It usually takes about 5-10 miles on the interstate...

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