Please help I can’t figure this electrical issue out

[Aiden Drukenbrod]

First post on here, I have recently picked up a 94 ram 1500 and I’m having some issues with my brake lights, when the headlights are on the brake lights will run until you press the brake pedal then they shut off, I have put in a new multi function switch a new brake switch and pigtail to go along, but none of these have fixed my issue. Any and all help will be appreciated.

 

[truckingrepair]

Check for leaks with a pressure test, inspect hoses and connections, especially near the lower radiator hose and heater core, and re-check the water pump and gasket for any issues. Temperature fluctuations could also mean air in the system, so make sure it’s fully bled.