Brake lights

Hello everyone I’m currently trying to fix my brake lights on my 1972 Dodge Dart 4 door, just put a better pair of taillight housings cause my original ones were real rusty. They work way better but only problem is my brake lights don’t work had the same problem with the original ones too. The new ones I put on work way better tho , my turn signals flash nice and bright & my hazard lights too but no brake lights what could be the issue? I also put a new brake light switch help please!