4x4 wont disengage on the front axle

What is your question?

i have a 4x4 dodge ram and last year i change a sensor that goes on top oftransmision i think is vaccum sensor switch where my 4 vaccum lines go. but now when i disengage the 4x4 on the shift on the floor the 4x4 light still on and the front wheel still lock some how and i kinda need to know what to check in the vaccum sisten that could go bad.