92 chevy c3500, 350, L480E trans. Been thru it, can't get a signal to
the dash from the DRAC module & don't know why. Have good AC volts,
within spec., from the VSS, got the 12v & ground to fire it, got output
from the DRAC so as to see it on a scanner. Checked the outputs to the
ECM & RWAL module & have all them but the blue/black wire to the speedo
is dead. Replaced the DRAC with another to no avail, put both modules
in another truck & they work in that truck, checked all the connections
at the module & they all ohmed out but replaced the pigtail too just
because I was deadended. Still no signal. Snipped the wire to the
speedo & checked it that way too in case it was shorted between the
module & speedo, still nothing. Anybody with experience here that may
have seen such a clusterfk, your input will be appreciated. Thanks, I
need the good luck this time.