Rivarossi N Gauge BigBoy TCS M1 Decoder Installation. This installation was performed by Ian Craddy.


Remove screw in chimney, and remove body.

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Remove front light connection. Remove motor connection.

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Remove lead motor retainer. Remove metal from rear top of chassis to make space for M1 decoder.

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Remove 10mm from rear of lead weight/motor retainer.

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Cut bottom motor contact, solder grey wire to it and place some Kaptron tape to prevent shorts.


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Thread decoder through lead weight and attach decoder to rear of chassis.

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Attach Orange wire to motor contact. Join red wire to Black wire in front of motor (put heat shrink on wire to insulate it). Join Black wire to tag on front of chassis. Join White wire, with some heat shrink, to the Head Light wire.


Put tape over wires to prevent them catching and getting broken.


Test chassis and then replace body.


The newer version is converted much the same way. The motor has been changed but is wired the same, and the lead weight has been changed to two plastic pieces that do not need to be modified.




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