'65 Dart No brake lights. Brake light switch failure?

No this is a common failure. The TS switch can fail and the signals still work but not brake lights. In the 70/ and later cars, this is commonly caused by the integrated hazard switch

Check the "output" of the brake light switch. I believe this is the white at the column TS switch connector. If you have brake light power there, of course pedal depressed, then it's the TS switch

Try working the hazard switch a few times

No power on the back of the switch when in any position. 12V Power coming into the switch. No hazards on a 65. I think the switch is fried. I think the shop didn’t disconnect the battery and fried the switch.

I was looking at the wiring diagram on my 65 Dart Service Manual and it doesn’t look to me like the power is routed through the turn signal switch. Maybe different in later cars.

I’m going to try replacing the stop light switch and see if that does the trick.