I have a 98. My 4x4 quit working. Found a vacuum line cut, replaced it , the switch on the transfer case and actuator under battery is new, cable is not frozen. I put an OBDI II and got codes for wheel speed signal missing on the front wheels. Got a CO237 for eradict rear speed sensor. Went to check transfer case, got link connect error. What do I check next? I know I have no floor heat. But I did have 4x4 at that time.

 

Need more info: 3 or 4 button 4x4 switch; is T-case switching into 4wd...can you hear/feel it?; what are the 4x4 switch button lites doing?

Why was the vacuum T-case switch replaced?
Were all the other vacuum lines connected?
Have you checked for vacuum?

Cleaned the front speed sensor?
I belive to access T-case link requires more than normal OBDII code reader.

 

Which link connect error did you get? What was the code?