For those who have upgraded Lionel engines that have Pullmor motors to TMCC via ERR's AC Commander, I would like to see how you wired the capacitors, wires and whatever else you did to the motor. I.E. Images of the motor after all the work in good clear definition.

Specifically for engines like the USA scale Hudsons, T-1's, Mohawks, etc. I'm upgrading a Lionel 18005 Hudson right now, and have wired both capacitors to ground, but it does not move. I want to ensure the wiring is correct, as I did follow from the instruction manual.

I wired things the same on a Lionel MPC Hudson, and it works 100% fine, but I also noticed that the hot and the ground had the same connection, but did NOT result in shorts.

If anyone can help me in this area, that would be great. Thank you~

Original Post

Check out this video. This is not my videoI have converted my Chessie T1. That ground is critical. What you may think is a good ground may not be. that was my problem



Thanks for the video. Unfortunately, the camera work isn't particularly clear for me to get a good look...

This is how I wired mine. The red wires are ground, and I multi meter tested to see if they were connected to the wheels.



Images (1)

I rewired one of the capacitors to one hot, and one ground.

Now I know you said that both have to be ground to work, but when I wired one to hot, the sound converter and commander DID respond to whistle and bell commands like a command engine, but the motor wouldn't respond either way...

The capacitors go from each brush to ground. One capacitor goes from one brush to ground. The other capacitor goes from the other brush to ground. Did you check the capacitors to see if one is shorted? You can wire everything up without the capacitors and see if it runs, but don't run it that way for more than a second or two. The capacitors are there for spike suppression and spikes will get into things and make then act funny.

Check all of your wires, one at a time. The instruction manual is on the ERR website and it should include a wiring diagram.

It looks like you have both ends of the field grounded. Only one end of the field gets grounded.

I have the illustration, but I have to make sure that the two Capacitors are in the exact right spot on the motors for the WILLIAMS SD45 diesel loco model. That motor does not look exactly like the illustration.


Here are the WILLIAMS motors and the ERR circuit board in place. The capacitors can be seen on the white board.





I have to be sure that the capacitors are in the right place for this motor type.


Falcon Service


Images (2)

Can motors (the ones you have) do not need these capacitors. They are just for the brushes on AC motors.

I hope you are not trying to put an AC Commander in the loco. You need a DC Commander, or better yet, a Cruise Commander.

The picture looks like an AC Commander, even though a better picture, from the top and showing the whole board, would be helpful.

Last edited by RoyBoy
RoyBoy posted:


The picture looks like an AC Commander, even though a better picture, from the top and showing the whole board, would be helpful.

Based on the 5 instead of 4 terminals at the motor/power terminals I'm going to say that he is trying to wire can motors to an AC Commander. That will not end well.

This discussion started as a question about a Pullmor motor and half way through a question about a Williams loco with can motors was injected into the discussion. This may not end well.    Regardles, there is a universal AC/DC answer. The capacitors must be non polarized and each cap goes from one brush then to a solid ground. Check your ground point for continuity with the wheels. Any motor with a commutator makes electrical commutation noise and caps are just as important on AC as on DC motors and vice versa.  If you use the sheet metal chassis frame as a ground connect ground straps from it to both trucks.        J

Last edited by JohnActon

Well that is an AC Commander that I was attempting to install.

If it needs a DC commander, then I can put the AC commander in a LIONEL GP38-2 and get a DC commander to put in the WILLIAMS SD45 in the next few weeks.

Thanks for the assistance.


Get a Cruise Commander instead of a DC Commander. The cruise control function will bring you lots of operating joy. You will forget the small difference in price after running the locomotive for a short while.

BTW, you need a Cruise Commander, NOT a Cruise Commander 'M'.

Last edited by RoyBoy

You can obviously use the AC Commander in anything that has an AC motor.  As for the DC Commander, I'm with Roy, I haven't bought one of those for years, strictly Cruise Commanders for me.  Once you have run with cruise on a large layout, you'll not want to go back.

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