UK Car Repair Questions? Ask a Mechanic for Answers ASAP
when you take off the encoder motor at the transfer case can you shift it manually?
the actuators on these are common failures. I see you replaced it. was the replacement a used one or new? also another common failure is the switch on the dash itself as this is also the module for the 4wd system.
sorry for the delay had internet issues most of the day yesterday.
the dash ch is the module not just a switch so chances are it is bad especially after soldering it.
since you said you had to solder contacts on the switch I would replace it. this are known failure points on these trucks and since you had a visual issue it should be replaced. but scanning the module is a good idea as well