Discussion Starter · #1 ·
So I bought the truck with the 4x4 not working when code is brought up says internal error. Most of the time this is referred to as the transfer case control module, so here is my problem. I have replace the module twice with a fresh flash also installed a new selector switch and 4x4motor. All of the transfer case harness is good has good ground polarity and volts...And it still throws the code all it does is the switch flashes then service 4x4 comes on. what's going on anyone ells ever have an issue like this, need a new place to start looking over it.