Cruise Commander M

Look at the motherboard next to the connector for the text "M3". That is pin 23. The pin opposite is pin 24 serial data. Plug in the R2LC and see if any of pin 24 is visible between the motherboard and the R2LC. If not you will have to solder the blue wire to the underside of the board to pin 24.

Here is pic showing top and bottom of the motherboard.

Pete

Norton,

Thank you so much for your reply.  The SD-60 example showed this step but wasn't sure if that was my solution.  Going to have to solder the wire to the bottom side.  Curious about one thing though, what is the switch on that board for?  Again just curiosity. 

Again Norton, thank you for your assistance.

Bob

Bob, I am pretty sure its the chuff switch. I suspect its located right over one of the axles. When you replace the board after soldering the wire make sure the switch opens and closes with wheel rotation. Use an ohmmeter on the contacts above the switch. With the board off you should be able to see the cam on the axle to know if its one or two chuffs.

Pete

That's a secondary chuff switch, but it's only used on some obscure locomotive.  It's simply in parallel with the chuff switch that's actually down on the axle, the motherboard is way away from the axle!

I think that chuff switch was used in some locomotive that had a mechanical smoke unit, that's the only reason I can imagine it being way up there. 

FWIW, I have the same Allegheny, and I can assure you that chuff switch doesn't do anything in that locomotive.

Gun Runner John,

The switch I'm referring to is the slide switch on the top right hand side of the radio board looking at the bottom of the board.  This is the top picture in the two picture illustration.  It's similar to the run program switch (slide switch).  I'm just curious to know if it performs any function.  I would know if I had a wiring diagram on this engine.  I know there is a schematic on this engine somewhere.

Thank you.

Bob

Folks, I believe there are 2 switches on this board; the cherry switch on the "tongue" of the board, and as Bob has pointed out, there is a slide switch at the top right edge of the top picture; went to the Lionel website and supplement 46 has the wiring diagram for this board (2-10-4, 2-8-8-4) and that slide switch is not connected to anything in this supplement. Falcon70

I'd have to ring that one out, there was a jumper on some of the boards for redirecting the chuff, maybe they put it on a switch?  Perhaps the PGM/RUN switch?

All of the above are just guesses without seeing the board.

Instead of soldering it on the pin, I stripped about 1/2" of insulation. I slid the bare wire into the corresponding socket on the R2LC, and then installed the R2LC.

Works fine.