Lima SNCF BB9200 series

     T4X Decoder installation

Pictures and text by Robert Lewis of Tilehust, Reading, United Kingdom
This is a Lima model of a French SNCF BB9200 series electric locomotive, as used on the Le Capitole express train. The pantographs are non-working.

Picture 9291-1.  To remove the body unscrew the cross head screw in the centre of the roof. the body will then lift off.


Picture 9291-2.  Remove all the existing wiring and the diodes for the directional lighting.  the pick-ups are from one side on the motor bogie and from the other, via the central retaining pin for the other. The bare copper wire seen clearly in this picture is the right hand pick-up on the motor bogie, this wire needs to be  de-soldered and bent away from the motor contact.

Picture 9291-3. The green and purple wires have not been used (yet), so they have been sleeved and coiled out of the way. An additional wire (green) has been spliced into the blue to provide a feed for the 2nd headlight bulb.  Solder the blue and yellow wire to the headlamp contacts at the motor end, the placement of an in-line resistor will reduce the brightness of the bulb, see the table on the TCS instruction sheet. The white and extra blue (green) should be soldered to the  headlight at the  opposite end.  The Red decoder wire has been soldered to the bare copper pickup wire on the motor bogie, make sure to sleeve the bare wire. Solder the black to the solder tag on the un-powered bogie pivot pin. Solder the grey and orange wires to the motor terminals.  The wiring at the motor end has been passed through the loop made by the gear retaining strip and the motor body to make it neat, and also under the loop of the weight retaining plug in the centre of the locomotive. The decoder can be stuck down with double sided tape between the weight and the bogie pivot. Test installation and then re-fit the body.

Picture 9291-4.  I have fitted red LED tail lights. The LED's are positioned next to the existing headlight bulbs, as there is a clear plastic "lightguide" inside the body it seems to work quite well. One LED lead is soldered to the contact with the blue wire, and the other run to the other end using some of the removed black wire from the locomotive to connect with the white or yellow as appropriate. A have used a  300ohm resistor in series with each LED.

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Entire contents Copyright Train Control Systems 2003-2007 Last Modified: Friday August 29, 2008 08:16 AM