I recently purchased a New Williams FM Trainmaster Diesel Locomotive. After setting it up I proceeded to sound the Horn and found the Volume to be extremely low ! Anyone know how to Increase Volume ?
Remove the body and find the electronic circuit board.It has a very small potentiometer on it with a small screw that should be turned clockwise to raise the volume.Sometimes this screw has what looks like varnish or glue on it and may be a little hard to turn.I have done this several times.Be careful not to pinch any wires when putting the body back on.
Much appreciated! That did the trick.