The DH163 series decoders are set up at the factory to control six function outputs.
The DH163 is configured to control the forward and reverse lights on the locomotive through the white lead and yellow lead using Function 0 (F0F-forward and F0R-reverse) for directional lighting.
Functions F1(Green) and F2 (Violet) are part of the harness for easy hookup.
F3 and F4 are also available on the decoder board.
These can be accessed by snipping the shrink wrap and peeling it back to expose the solder pads that control these functions: 
To use these functions, solder a wire from the pad for the function you wish to use to the lamp (or other function) you wish to control.
The Blue/+Common pad works the same way as the blue wire on the harness and is provided here for convenience.
The wire colors indicated are the standard color code used in the industry (you can use any color you like).
These colors are important if you plan to use function remapping.
CAUTION: When adding function wires, be very careful that the wires you add do not come into contact with any other pads or components on the board where they might create a short circuit.
All six function outputs can be easily set up with Digitrax FX3 lighting effects or as standard on/off functions with the following operational qualifiers:
1. Forward or Reverse direction of travel, or
2. Whether F0 is on or off, or
3. Both direction of travel and whether F0 is on or off, or
4. Whether the locomotive is stopped or moving.