Does anyone knows where the main ground wire for the transfer case motor is located? i was able to do some massive work on the blazer today with a new fuel pump, new ignition system, new cooling system, new brakes and all and i did clean one ground wire on the passenger side on the frame by the transmission cooling line, but that didn't solve the 4wd problem, however ...... i did notice "as it was getting dark" that the lights were dimming when i click the 2HI and i can hear the motor trying to engage but it won't, leading that it will be a bad ground wire "assuming that it is"

Any help will be greatly appreciated.

Thank you

 

Here is your circuit diagram(s).

George

 

Thank you very much sir.