Hi Marty could you post your schematic for the 3 volt upgrade kit again... I have the one from MTH but it's getting a little difficult for me to read... Yours has the pins numbered.
I had it printed out but can't find it. I though I was through doing up grades but 1 more to go..... . I;m just about done but have ditch lights, maybe markers, and cab light to go plus a new sound file. .