Hi guys new here, hoping to get some help for my 09 silverado
My 4wd selector switch has no lights., and have done the following
Replaced selector switch – did not help,
Ground wire under driver door/frame – removed cleaned, did not help
Remove the front diff actuator, bench tested it – it works
Checked 30A fuse – it is ok
Did the reset sequence – keyOn, gear N, turn selector to N wait 30sec – did not help
Getting the following codes: B0780 and 90 4wd low range indicator circuit short to battery, same msg for 2H 4L and N.
Also getting code U0102 lost communication with the transfer case control module – so I thought the TCCM was bad. I swapped with it with a new transfer case module, did not help, selector switch still dark but got a new code saying something about “Calibration not learned” Even if it is not calibrated, why is the selector switch still dark, so I thought the issue is not the TCCM, Or is it??
I am stuck – any help is much appreciated, thx!
Hi guys new here, hoping to get some help for my 09 silverado My 4wd selector switch has no lights., and have done the following Replaced selector switch – did not help, Ground wire under driver door/frame – removed cleaned, did not help Remove the front diff actuator, bench tested it – it works Checked 30A fuse – it is ok Did the reset sequence – keyOn, gear N, turn selector to N wait 30sec – did not help Getting the following codes: B0780 and 90 4wd low range indicator circuit short to battery, same msg for 2H 4L and N. Also getting code U0102 lost communication with the transfer case control module – so I thought the TCCM was bad. I swapped with it with a new transfer case module, did not help, selector switch still dark but got a new code saying something about “Calibration not learned” Even if it is not calibrated, why is the selector switch still dark, so I thought the issue is not the TCCM, Or is it?? I am stuck – any help is much appreciated, thx!