we can't get brake lights to work unless we by pass switch but we bought 3 new switches still don't work but we have tail light parking light turn singals fuse is good power goes to switch nothing back from switch any help and maybe a wiring diagram thanks

 

Welcome to the site 54Ford. Kind of an unusal name for a Chevy guy.

Sounds like you might not be adjusting hte brake light correctly. try manually working the switch and see what happens? If would help a ton to know the vehicle specifics, year, make, model, would be great starters.