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Most of these NMRA harnesses are made for specific applications. But there are hundreds of different locos, many of which we've not seen. For that reason, we've provided the following information so you can check your loco to see if one of these harnesses will fit your application exactly. If your loco requires a special harness, we can provide you with a custom cable if you can provide us with a length and configuration code based upon the information below.

There are four different harness configurations, as illustrated below:

Notice that the wires are leaving the NMRA plug away from the pin 5 (grey) end of the plug - hence, GE for Grey End.

All there is to determining which harness you need for your application is to determine which way the wires need go away from the NMRA socket, and how long the wires need to be.