Brake Lights not working

I have a 1993 Chevy G20 that has been great for towing our small camper. Recently the check engine light came on and it was for the brake light switch showing low voltage. So I replaced it today and now the brake lights will only come on when I activate the brake controller for the trailer. I have disconnected the brake controller completely and still have no brake lights when I push on the brake. The controller and brake lights worked fine prior to this issue. It is a simple part to replace as it has two plugs and that is it. I do still have power to the switch and continuity to the fuse. I even put in the old switch to see if the lights work and they don't. I have tested the new switch and it is working as it should. Did a continuity test across the leads and pushed the button in and out and it works fine. Any help will be great. I need to get back on the road today. I might also mention that the hazards are not working either.