Atals O TMCC MU Lashup Question

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After you address the train try hitting aux1 then 0 to reset the train. I have a couple of k-line engines that the headlights get out of sinc when I create a MU/Lashup. Just a thought.

The original TMCC consist programing only allowed the front and rear head lights of the consist to function.  Atlas I believe has the Head light and rear marker lights on the A unit wired together. If there is a rear light on the A unit it also would be wired to the front marker lights if there are front markers. At least that is the way my Atlas GP7 is wired.  I don't know how your B unit lights are wired. but programming for the center B units all lights would be off.  Does the rear B-unit have a front and back head light?  If it does when running in reverse the rear head light should be on all others off.

Front A unit TR ## Eng ## F set   Front head light on in forward, off in reverse. Front coupler works but not the rear. A unit rear head light circuit does not work in the consist.

Middle B unit TR ## Eng ## set    (all light off)  (both couplers off)

Rear B unit TR ## Eng ## R (DIR possibly) set.  Rear head light on in reverse, off in forward.  Rear coupler works, front coupler does not. Rear B unit front head light does not work in a consist.

Most likely the marker lights are hooked to the same circuit as the opposite end head light.