WARNING! Rapido GMD-1 ditch lights

[faraway]

I could not rest until the basic problem of an ESU dominated GMD-1 is solved.

Step 1
Strip the drive down, put a Tsunami 2 EMD PNP with double side sticky tape on the motor aligned to the end of the rear flywheel and solder the rail and motor wires in place. This vehicle should run perfectly.



Step 2
Rewire the ditch lights. + and - minus are printed on the small PCB



Step 3
Understand the front and rear light units. From left to right: Number board, Marker lights, Head light and right side is common Plus



Step 4
Rewire the light units. I wired front light and number boards together. Not fully correct but on a small switching layout a simple solution. The marker lights are not used.



Step 5
Assemble the light units with a drop of CA glue in the area of the former screws and isolate the bottom side




Step 6
Mount the light units with capton tape. It looks awfully but it works great. It is my preferred method to mount light things in the shell.



Step 7
Solder the wires to the Tsunami but do not forget to protect all four wires (front, rear and two ditch lights) with 1k5 resistors! I use FX3 and 4 for the front and rear ditch lights. May be I will rewire it to use FX 3 and 4 for the front and FX 5 and 6 for the rear ditch lights. Anyhow I wanted to keep the first test simple. The wires should shortened to when you know everything works.



Step 8
Put on "ESU-free GMD-1" on the rails. Absolut no humming at lowest speed



update:
The ditch lights are rewired to be individual controlled by X3, 4, 5 and 6. That permits alternate ditch lights and grade cross logic (solid on of F key, alternate for n seconds after horn is operated). Just two more 1k5 resistors and two more wires.