4x4 seems stuck on still after new 4x4 actuators and solenoid

[Ellison Brown III]

If you haven’t already, check the lines that connect between the IWE’s and solenoid.

 

[terr5178]

I have the same truck. I'll go out tomorrow and trace the vacuum line and check that plugged port on intake. I'll send pics.
As for the selector. I had a similar problem. Broken vacuum solenoid then I used dielectric grease on the electric motor connector on the transfer case i varified it would rotate. I also removed 4wd fuse(forgot which ones) I think that reset the module and everything started working again. I have a feeling it was just corrosion on the pins and bad solenoid that confused the module and needed to be reset. Works great now.

 

[terr5178]

Plu on intake plenum is correct.
My vacuum for 4wd taps into vacuum at brake booster then travels forward under engine to solenoid on fan shroud.

 

[billyfrancis40]

Thanks for all the post here what my scan looks like

 

[terr5178]

Looking like an electrical issue. Very common for corrosion in wires from smart junction fuse box and door saddle. I'd also try messing with any grounds under the truck ..

 

[billyfrancis40]

What is the smart junction box