Fan Clutch Issue
02-01-2026, (Subject: Fan Clutch Issue ) 
Post: #1
Fan Clutch Issue
2016 cascadia, DD15.

Fan clutch is stuck in engagement and will not release.

Fan clutch replaced in the last 50k, can pull Airline and feed with aux air and the Fan clutch will release.

Used power probe and when applying power and ground to solenoid the fan will release.

When testing plug to solenoid neither power nor ground can be found.

Where does the plug start and get power?
I can not find an associated relay or fuse location.

Any direction would be appreciated!
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02-02-2026, (Subject: Fan Clutch Issue ) 
Post: #2
RE: Fan Clutch Issue
could be the A/C system low on refrigerant and causing it to stay on all the time.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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 Thanks given by: amermextrucker
Yesterday, (Subject: Fan Clutch Issue ) 
Post: #3
RE: Fan Clutch Issue
With the ignition on it should have ground on one pin, the other wire is supplied voltage from the cpc. The a/c pressure switch should be normally closed and the circuit will open to activate the fan. If you have a manual fan switch, this is normally open and the circuit will close to activate the fan.

The cpc pin numbers on yours may not match this diagram, but there are plenty of documents on google that should get you close enough to be able to figure it out

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