I see a pair of wires going from each light bulb to each truck. I also see red wires that appear to be connecting each bulb. What is the purpose of the red wire???
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Just take the wires from the trucks (wheels & roller), they are paralleled inside the car. I put a .25A trip PTC between the roller wires to protect the wiring in case of a derailment.
You then tie the power for the LED lighting into the track pickups, and you can do that on either side of the PTC that was added.
So i remove the red wires, they are not needed.
You need to keep the wires that go to the wheels and rollers, I don't know what color they are. First step is to pull the sockets out of those holders so you can see how everything is wired. I did a whole fleet of these with LED, but I don't remember wire colors.
