Red/light green wire should have no connection to any exterior lights
It only powers engine systems
It turns on the EEC Relay, EEC Relay powers EEC(computer), fuel injectors and Fuel pump relay(not fuel pump)
Red/green wire also powers spark system
Do this, unplug EEC relay then power up the system, see if brake lights come on
If so then problem is on the red/green wire some where
If no brake lights then problem is on the EEC Relay wiring, the RED wires in the engine bay
Plug back in EEC Relay and see if brake lights come on to confirm
Just as a heads up
Ford did use a Light Green/Red wire for 12v to brake light switch............so dyslexic wiring issue, lol
Red/green engine systems
Green/red brake lights
Out to brake lights should be light green wire, no stripe