I have an 8215-T15 Circuit board. I have 3 wires attached to a pin connector that runs between the locomotive and the tender. What does each wire do? One is blue, one is brown and one is green. The model # is 691-8003-T01 D. L. and W. Tender.
Try this topic: https://ogrforum.ogaugerr.com/...fication-help-please.
Regarding the three wires to the engine.... One of the wires (brown) goes to the center rail pick-up of the engine. The black wire is attached to the common (frame) connection on the back of the motor. The third wire (blue) is attached to the motor field winding connection, also on the back of the motor. And I confess that the latter connection makes no sense to me whatsoever in the present situation/operation of this set.
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