Repairing TNA Trains

[Super]

Excactly what Splodge says. The strands inside the covering of the wire could also been separated. If you look closely to the left of the squashed wire there looks to be a cut. And there looks to be a pile of corrosion on the battery contact at the resistor too. Is this the one where the contact has also broken off in the battery compartment? Don't know if you know it but you can click on the picture to get a closer view and then click it again for a super close up.