Hello, I have a 99 blazer 4WD 4.3L automatic. My 4WD module is not working (broken connector pins) so while I'm waiting for a replacement connector is there any way to bypass the module and force the truck into 4W-HI? Tons of snow and driving in real wheel only is not fun!! I have the module pinout... what signal can i jumper to force the system into 4WD?

 

Sorry to ask such an obvious question, but have you tried to straighten the pins?

Other than that, what transfer case do you have? 3-button, NP233 or 4-button Auto4wd NP236?

 

Couldnt you just pull the actuator cable and clamp it off? keep it locked in?


Or is the problem here in getting the transfer case into 4hi?

 

I read it to be that the TCCM connection had bent pins which would mean that none of the system is getting engaged, not just the front axle.