I have a Spectrum Modern 4-4-0 (bright blue box, "DCC Sound On Board"). Can I get a wiring diagram, or a list of the 6 coloured wires and what they do?

Also, various reviews mention that this model has a cam for synchronising the exhaust chuffs. I've tried CV112=128 (Bit 7 on) and the default zero. Neither seems to have any effect. Does this loco actually have a cam? How do I activate it?

Hi,

I have an older HO 4-4-0 Modern Richmond loco, model #83402, on which I would like to install sound. To avoid smoking a new decoder (!), I would really like to find a wiring diagram for the original Bachmann light board. Mine is not the same as the one I've seen on-line in some installation guides.

I'm pretty sure some of the red and black wires are power from the rails, but the pads marked M+, M-, L+, and L- (brown, yellow and orange wires) are a mystery. Which to the motor? Which to the headlight?

Any help would be appreciated!

Thanks,

Brandon