If you decide that a service place is the way to go, you don't need a TM dealer. The breakaway switch is mounted and wired electrically the same on every trailer. Any RV place can handle it.
If the wires pulled out of the switch and the bare ends were exposed, my first thought is that the hot wire hit some metal, and blew a fuse. With the tow vehicle disconnected, the only fuse involved is the TM's 30-amp main battery fuse. If your interior lights work with the tow vehicle disconnected, they are being powered by the TM battery, so that fuse is OK.
If you have a voltmeter, check the voltage (to ground) on each of the two exposed wire ends, one at a time. One of them should show 12 volts. If one does, power is reaching the switch, so the other one, which is connected to the brakes, is the one at fault. You will need to trace that wire. If neither shows 12-volts, you will have to trace both of them.
Let us know what you find, and we will continue if we need to.
Bill
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