@texgeekboy posted:Thanks for getting back so quickly. That picture totally clarifies this project. Regarding the secondary issue I had with the fastrack operating track, the uncoupler was okay, a wire underneath was totally fried. I replaced just that wire, and it's working. I have some PTCs on order, and will put them in as you suggested, however your track wiring you posted on the other thread isn't close to what I have, as far as I can tell. The B&W stock picture below looks like what I have. (FYI, the wire connecting the 2 red circles was the one that was fried.) It looks like the wire connected between the green and blue circle is what provides power the uncoupler. I think the PTC should go between the green circle and the uncoupler, Correct?
Short answer, yes, you're supposition is correct.
That's interesting that the wire between the two red circles melted. It's a jumper between the two topside center power rails on either side of the magnet. It's failure may or may not be related to the coil.
You're right of course about the Operating Track wiring being different from the 5" Uncoupler. The connections for the PTC are similar though. Here's how I connect them. Desolder the hot side coil wire from the green auxiliary rail tab where the orange line is below. Note that this is enamel coated wire and all but the end that's already soldered likely will not easily take solder without removing more of the enamel.
I would suggest covering the PTC leads with heat shrink tubing before soldering it between the rail tab and the coil wire as shown below.
