I have a set of MTH 20-4029 NYC 70' Madison type passenger cars. These questions apply to the tail end car with the two (2) side marker lights and the one (1) rear drum head light.
What is the voltage of these bulbs which all appear to be the same?
What is the purpose of the four (4) diodes?
And lastly, does anyone have a schematic of the proper orientation of these diodes on the board?
I may have screwed up when I replaced them thinking they were bad.
Thanks, Joe
