Gentlemen, I too have a brand new GP 20 never taken from the box I ran it around a few times on my layout until it shorted out between to blocks with different polarities, However I saved it just in time. I have tried to install new bushings and spring in the trucks for electric pick, however some wires have come undone from wire nuts and have no clue where they go, can someone direct me to a repair guy or where I can find a wire diagram
otherwise I am out of a lot BUCKS