I have an FA-2 ABA set. The Powered A unit is Proto-Sound 3 and the unpowered B and unpowered A units are from an older Proto-Sound 1 set. They are all the same liveries so they look like they belong together on the outside, but the components are obviously not 100% compatible on the inside.
Typically, there is an operating coupler on either end of both A units and the dummy A unit has a tether that connects back through the B unit to the powered A. Because the powered A is ~12 years newer than the dummy units, the connectors are not compatible, so the rear coupler will not function. Strangely enough though, the front coupler wont function either even though it is attached directly to the powered engine.
So my questions:
1. Is the front coupler not working because there is no connection to the rear coupler? Or is there another problem altogether? I bought the engine used but it functions perfectly other than the coupler problem.
2. Is there some way I can get the rear coupler to work as well? I figure it would involve wiring the 2 coupler leads that head to the rear tether up to the dummy A unit, but what is the best way to go about this?
Any insight would be appreciated.