looking for a wiring diagram for item 60910 HO emd sd40-2 diesel loco

[Palexmi]

Any one know where I can find one?

Thank You

[Len]

Wiring diagrams of Bachmann locos are notoriously hard to come by. If you have the standard DCC version of the loco the markings on the PCB connections relative to the front of the loco are:

R:    Right Rail
L:    Left Rail
M+: Motor Brush Connected to Right Rail
M-:  Motor Brush Connected to Left Rail
L+:  Light Positive
L-:   Light Negative

So the wires from the right side of the power trucks should connect to the 'R's on the board, those from the left side side to the 'L's. If a dummy plog is installed, instead of a decoder, the motor leads should connect to M+/M- so the loco moves forward when the right rail is positive. A mulitmeter is handy for determining this.

Len