@coach joe posted:John very nice job and an important piece of equipment. So do you have to remove the board from the engine to test it? How do you connect to the board if not?
As long as the cables reach, you can just unplug them from the locomotive and connect the test set. I actually have used it to just test lighting by only using the two lighting cables. You can do the same for the two smoke units, the couplers, etc. That works because what's on those connectors is isolated from the rest of the circuitry. Most of the groups of functions are isolated when it comes to the external wiring.
