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Reply to "PS-3 F-Unit Couplers"

Huh, John you are wrong.  For PS-3 Diesels the front coupler will not work with out a rear coupler sensed or a jumper with a resistor in place.  F units should come with that jumper. 

So you can get a ps-2/3 type coupler and replace the Trail A PS-1 coupler with the PS-2 type and then both will function when you wire it up to the Rear coupler connection on the PS-3 engine.  G

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