Failure at Kenworth T800 Model 2012

Greetings to all

I need a favor
I have a Kenworth T800 dump that does not mean the manual drive of the FANCLUTCH This FANCLUTCH is only automatic funeral but you need to make it manually fingish
and check the activation election of this ventilated and the switch I also changed it and it has not worked for me.
X Favor Nesecito I am collaborated since I don't know what else to do this fault.
or Forfavor collaborate with the elective diagram of this site or the manual of the electric system of this vehicle.
If someone has it, I would be very helpful for this failure