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Old 07-14-2018, 03:01 PM   #1
homewrecker
 
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Fan clutch test procedure

Anyone know the service manual test procedure for a 16 model? Its a 4500 c&c. Only thing Iíve been able to find online is on 13 and older. Not sure if itís changed on the newer models. Mine is staying on constantly. The speed varies but I would guess its at 80% or higher all the time. Temp holds steady at 192 even the hottest days pulling a load. A/C is working fine. The fan is on immediately when cranked in the morning. You can spin it by hand, has a moderate drag.


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Last edited by homewrecker; 07-14-2018 at 03:02 PM.
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Old 07-14-2018, 04:10 PM   #2
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Usually if there is a significant problem, they throw codes in the ECM.

Mark.
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Old 07-14-2018, 10:09 PM   #3
homewrecker
 
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No codes. Unplugged the fan clutch today and cranked it. Still roaring when revving it up in park. May take a drive tomorrow unplugged.


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05 ram 3500 4x4 QC dually SOLD

05 2500 QC Laramie sport
Garmon built tranny
FI 63/68/.91 ETR-HO S480/92/1.25
dual pumps
105% injectors
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Old 07-14-2018, 10:11 PM   #4
homewrecker
 
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The codes Iíve seen are related to it not engaging or engaging at too high of a temp. Not aware of any for it staying engaged.


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05 2500 QC Laramie sport
Garmon built tranny
FI 63/68/.91 ETR-HO S480/92/1.25
dual pumps
105% injectors
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Old 07-21-2018, 02:08 PM   #5
homewrecker
 
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Changed the fan clutch today. Fixed the problem. Guess there are no codes for the clutch staying locked all the time


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05 2500 QC Laramie sport
Garmon built tranny
FI 63/68/.91 ETR-HO S480/92/1.25
dual pumps
105% injectors
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Old 07-21-2018, 02:30 PM   #6
Mark Nixon
 
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If the parameters were right, it could have set the following code:

P0483 Cooling Fan Speed

I suspect this code may be an under speed code, because over speed is a more desired condition than under speed.

IMO, I'd rather have a fan locked solid, than one that won't spin @ 3000 RPM on a grade, with a heavy load.

Mark.
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