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Normally, those mating contacts just need a bit more solder on the switch motor or occasionally they have poor contact in the switch track itself.  You have to look to see what the issue is.

 

If that connection doesn't complete, the switch will indeed appear totally dead.

 

One other place to look, the ground is through the raised edge of the switch machine and the copper strip that mates with it.  That's another source of issues.  I solder that copper strip to the track crimp to improve that connection, and also make sure the arch in the copper strip presses against the switch machine when they're mated.

 

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