Something I wondered about . When the diesel " blocks " were separated, how was the direction of travel determined? Were there relays in the MU circuit, or did the engineer have to manually throw a switch. It may not have been an issue on the A-B-A grouping as delivered, but after they were broken apart? Just pondering. Thanks for any replies .
The M/U cable connections on each locomotive unit have two connections that control direction of travel; one forward and one reverse. Those two connections are reversed internally at the front end of each unit. So a forward command is forward at the rear of the locomotive and reverse at the front of a locomotive. The M/U jumper cables also have the same connections reversed end to end. Pin 8 of the M/U cable is the reverse wire at the rear of units and Pin 9 is the forward wire at the rear.
Thanks, Keith. I figured it had to be reversed some how, just didn't think of pins in the MU cable! I've worked with reversing starters for years, just never thought of just wires!!
As Keith stated it's all about the MU jumper cables. The instructions in the F-7 manual are very terse.
