Hi Buzz! Thanks for the help tracking this down. I know some engineers have been caught modifying their locomotives in various ways, but I haven't made any changes to the RS-1 at all...so this whole thing puzzled me.
I just interviewed the RWA shop foreman, and he admitted that as soon as the "RWA_Lakeside_Patch_30-09-14.zip" was applied, he started getting reports of these four gauges not working on the RS-1 fleet. Sure enough, removing this patch allows the gauges to function, and re-applying it breaks them again.
Easily fixed by applying the patch, and then copying a pre-patch backup of the RS-1 folder overtop of the patched files.
Screenshot_RWA Lakeside_46.51835--90.73148_11-02-28.jpg
It looks like the patch did fix the incorrect marker lights, but the gauges are more important to me than the lights.
I'll PM Rick so he's aware.