Richmond Controls of Richmond, Texas has been providing small lighting modules for model railroaders for many years. Features may include constant brightness head lights, MARS lights, simulated rotary beacon, and other similar features. For more information about Richmond Controls check out their web site.
A variable DC power supply was used for this test and the current draw did not change much between 6 and 12 volts.
To start this installation, the mechanism will need to be fully disassembled.
In this case to have room for the Richmond module I went back to my old method of using the TCS M1 wired decoder and a frame milled by Aztec Manufacturing.
I did not invent this technique myself, but read about it years ago in N Scale magazine. Here is a PDF reprint of that article.
Tip:If you ever have a locomotive where one or both sets of wheels don't turn when the motor is running, check this or it's equivalent part for being loose on the shaft.
Black / Red = 2 inch
Orange = 1-1/8 inch
Gray = 1-5/8 inch
The White and Blue wires can be left alone for now.
As with many of my other installs, I file a groove on the side of the motor body for the longer of the motor wires to reach the bottom of the motor
The Richmond Controls module is then attached to the frame in remaining space with either double stick or adhesive.
The blue wire from the decoder is cut a bit shorter than the yellow wire and then spliced with the section of blue wire that was cut off. Both are then connected to a 680 ohm 1/8 watt resistor. The resistor is then connected to the anode side of the LED. Heat shrink tubing is used to cover these connections.
When the body is placed back on the mechanism, care must be taken with small wires to the rotary beacon.
Also, it is best to check the coupler height for both ends of the locomotive against a Micro-Train reference. This the body of this model is a loose fit on the frame and if the body is sitting too low it can cause coupler height problems and the bottom of the body hitting the rails. It may be necessary to place shims made from polystyrene strips on the inside of the top of the body.
Recently I've been learning how to work with YouTube a little bit and thought a good way to end this post was with a short video showing the simulated rotary beacon on this model in action.