For some reason my 4wd doesn't work right, it does not go into 4hi or 4lo at all. When i press the 4hi or 4lo buttons they blink then the bottom two lights stay on but i'm still in 2hi. I have the 3 button switch. I did the diag to it by grounding out pin 13 inthebase obdII connector and it gave me 2 flashing lights which I believe is the tccm? If this is correct how do I fix it and aprox how much.

 

does anyone have a solution to this problem? (apross44 responding on friends account)

 

now I also have another problem including the old on listed here. I hit my 4hi button on my dash by accident last night and now the tccm is just clicking rapidly and I cannot get it to stop. It will stop clicking when I put it into gear or park but when I shut the truck off it starts going again. I had to disconnect my tccm (under the ps kick panel) to make it stop. did my tccm get just go or is there something else to it? and also can I drive safely like this because it is still in 2hi?

 

Have you tested the switch? Maybe the 4HI button stuck? The schematics are posted in the Tech Article (DIY) NV233 thread by error_401. You can also look up what the code means by looking in the OBD2 NV233 Diagnosis thread. Both of which can be found by clicking on the Tech Article (DIY) Index link in my signature below.