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

67Dart273 said
In the diagram, wire D4, to pin 7 of the TS connector is the output of the stop lamp switch feeding TO the TS switch.

Okay I get it now. Thanks for that explanation!

So if D3 is power from fuse box and power is always routed through the SL Switch to D4 to the TS switch what is L8 doing?