'Sound install Update'

To all that made recommendations and comments to the thread, and those members that may want to install an ERR sound kit into a WIlliams engine that is only equipped with a horn and bell system.  

I decided to reverse the the power connectors form their prescribed locations. I took the power lead from the installed williams board and plugged that one into the open port on the Reverse board.  I plugged the ERR power lead into port for the original williams sound board.  And the Err sound board came alive.  IN neutral, all 6 motive sounds play beautifully.  In forward, the motive power sound is in the 3rd rev up sound.  AT 10VAC horn and bell sound and motive sounds rev up accordingly. 

In lower speed, horn and bell do not activate.  But the motive power rev up and down is quite impressive.  The sound from the speakers is vibrating in the original williams baffle that I will add some foam to absorb the vibrations. 

 [Epilog] So by switching the power leads solved the problem contrary to the ERR instructions.  Perhaps, the williams boards in this particular model are not receptive to the normal prescribed set up in the ERR standard directions.  I will send Scott Mann, a copy of this post for his reference.  The Williams, SD-40 locomotives electronics are dated 2004 on the circuit boards.  Here is a photo of the interiors components.