made on the main, where you can hear and see the results of
your changes.
If you are unable to read from the decoder, carefully check
your wiring for any shorts. Use a buzzer to verify that there is
no path from the motor leads to either frame half. Likewise,
there should be no continuity between the trucks and the
frame halves. Check the speaker, too. It should be totally iso-
lated. Check for continuity between the wheels and the rail
contacts on the decoder. Check for motor continuity between
the M+ pad and the M–pad.
If you are able to read and write CVs on the programming
track, then you can operate the loco to the main track and you
should get sound and motion, but no lights, yet. Make sure
the loco goes forward when the DCC system tells it to do so. If
the loco runs backwards, reverse the M+ and M- leads at the
decoder and retest.
12.0 Final Assembly
Let’s get this guy back together. Finalize the motor wiring and
lead dress, if necessary.
12.1 Rebuild Cab
To reassemble the cab, start by hooking the rear light board
assembly over the tabs on the rear lens inside the cab roof.
Then install the rear window set, snaking the yellow and blue
wires through the troughs molded in it for the original contact
strips. Slide the front window set into place. The side windows
snap in place securing the front and rear windows and the gray
LED housing. Some adjustment may be necessary to seat the
front and rear windows so that the side window assembly will
seat correctly and hold them all in place. Snap the cab floor
