Legacy wiring diagram - wires disconnected and smoke unit

https://www.lionelsupport.com/...s/71247SRCMCLP1.jpeg

Note that the diagram has the "common" going to the center terminal of the switch, where as your actual implementation of the locomotive seems to show it being the black wire on the outer terminal. Functionally, it doesn't matter which terminal, the center or side, is "common" and "signal".

Trace the green an blue wires back to the connector to properly identify (with the help of the above diagram) which one goes to what switch.

Thanks. I did not know to find that on the Lionel site.

on the smoke unit, does most replace resistor and batting if they already have it open? Mine looks to be okay and resistor reads 8.3 ohms. Just was not sure as this all takes time. Picture of mine below.

The smoke resistor is of the 8 ohm type, so you are right in range. Your picture shows your resistor to have some charring. Can't hurt to replace the heating element/resistor and upgrade the batting and lubricate the fan.

Personally, I wouldn't bother replacing the resistor, the new one will look like that in a very short time.  Ditto for the wick material, that looks fine.

From several Lionel wiring diagrams that I have looked at the yellow wire is the Run/Program.  Strip, tin, and solder the yellow wire to the center post on the switch on the right.  The green wire gets the same treatment but connect to center pin on Odyssey left switch.

If you are ordering a new smoke unit motor and a resistor, then don't forget to get some new batting also. It works better than the original.  It needs to be frayed out, rolled up and tucked into the chamber.

I have another technical question if anyone can answer. I have not replaced the smoke motor yet since I am waiting on a replacement screw since i stripped the original head and am waiting for one in the mail.
On the original smoke motor with 5vdc I get 72mA. The new motors from Lionel are reading 82mA.  This is confusing me. The only difference I can tell is maybe a slight high pitch from the original motor when on.  I did test the original motor with a 9v battery first so I do not know if the extra voltage made it to work better or not.

in addition, I tested the power coming into the wires from the board when powering up the train in conventional mode since I don’t have a legacy yet with the smoke unit unplugged. The fan motor wires start to produce in the Mid 4vdc range for about a split second and then turn off as well with the ac power comes on then off to the resistor all while the cab has the 3 light blinks.  Is this how the power works if the smoke unit is not plugged in or with the resistor and fan motor disconnect?  I am praying I do not have a board problem.  All other functions of the engine seam to be ok and working.

First off, I recommend you do NOT test smoke fan motors with 9V, they're rated at 5V, and that's the most they ever see in actual use.  Any current readings you get at 9V will not be useful as the currents should be measured at 5V.

I also suggest you review what you're testing with, specifically the accuracy.  80ma on a smoke motor will trigger the RCMC smoke fan motor fault analysis almost 100% of the time!

I tested four new 610-1154-130 Lionel smoke fan motors, all of them came in between 43ma and 46ma at 5VDC.  The measurements were made with a calibrated Fluke bench meter.  These are the short motors with the diagonal mounting holes.

I then tested three new MTH BE-0000041 smoke fan motors the same way, and they clocked in at 33ma to 35ma.

Finally, I tested three new larger Lionel 610-8057-211 smoke fan motors, they clocked in at 33ma to 35ma as well.  These motors appear to be very similar to the MTH smoke motors, only with longer shafts.

As to your question about the smoke fan error code, you should get that code after the RCMC runs the smoke fan motor and sees excessive current, it takes a moment or to of running to sense any smoke fan failure.

Thank you for advising John. I was measuring the amps wrong in the previous post.  For this new motor at 5vdc it is now reading around 25ma. I put it back together with new motor, resistor and batting and all seem to be good.  

Sounds good, glad it was a happy ending.