96 FLD 120 / 12.7 S60 Fan Always On

@Rideandrepair You have any thoughts?

I also tapped the clutch with a hammer today to make sure it wasn’t stuck since truck has been sitting for weeks.

Air is going into new solenoid, but not going out from solenoid into fan clutch.

 

Not personally but could take it to the dealer if needed.

I am not seeing any dash codes flashing.

Not sure about a fan stat? I do have the coolant level sensor on the surge tank and a water temp sensor somewhere that goes to a dash gauge and it’s working.

 

Thanks! It’s a DDEC 4 currently but probably the same applies. If I wanted to test the plugs for those sensors and solenoid, what would I look for? To make sure there isn’t a break in the wires that I can’t see.

The plug going into the fan solenoid I’ve checked and one prong is +12v and the other is -12v. Would I look for the same thing for the two AC drier sensors/switches? To make sure they are getting the right power or whatever.

I’ve replaced all 3 with new but didn’t fix.

 

Sorry I meant if I wanted to test the two AC plugs on top of the drier. As far as the fan solenoid yes one prong has +12 and another has -12. Air going into the solenoid but does not come out of it. With key off, or in accessory, I can’t move the fan seems engaged. But when I was doing the radiator/AC condenser and drier job right before this I was spinning the fan freely during the process…

 

I am checking for air going into the inlet of solenoid for air supply, which there is. Then I remove the outlet air line on the solenoid that goes from the solenoid to the fan, and there is no air coming out of the solenoid/that line. That line is a couple feet long with one union in the middle of it, does not look pinched or anything.