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Plate 239: Wiring the point motors through the distribution center, Part 17: all the jumpers have been installed, and we have continuity
(This plate added NOV 2003)

The bus is now fully wired, with all nine jumpers installed. The accompanying picture shows the result of a successful continuity test. The resistance tester indicates "zero ohms" (zero resistance) for the complete bus.

Observe that the red lead is clipped to one of the two terminal screws in row 1, column1, and that the black lead is clipped to the free end of the "common" wire. This means that current from the tester's internal DC power supply is running with zero resistance through all nine jumper wires as well as the "common" wire.