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Today we are going to install part number 90185 from Tekonsha. We are installing a Prodigy
brake controller on a 2004 GMC Envoy. The first step here on the Envoy is locating the
tow package. And the tow package is actually located underneath the dashboard behind this
plastic facing here. There are 2 screws, one to the left and one to the right that hold
that into place, and we will go ahead and remove those and pull this down. Then we will
locate the wires that will be right up over here somewhere. The panel just pulls away,
like so, but make sure not to pull it too hard because there is the diagnostic and Aux
port over here that we do not want to pull any wires out of.
With the paneling pulled back, if you look over here and there are 4 little wires, there
is an orange, a dark blue, a light blue, and a black, that are taped to this main harness
here. We want to go ahead and cut the tape that is holding those to the main harness
and pull those out. And those are our 4 wires that we are going to use to install our brake
controller. With the wiring we are going to the black on the envoy here is going to go
with the white on our Prodigy harness. The dark blue is going to go to the dark blue.
The orange will go to the black and this smaller light blue gauge wire will go to the red.
Let me go ahead and make those connections now. The Prodigy actually comes with the four
connectors necessary to make these connections. We have 2 for the smaller gauge wires and
blue ones and yellow ones are
for
the heavier gauge wires.