Are you running the same bulb filament for turn signals and brake lights? That requires a discriminator switch integral with the turn signal switch on the steering column. If you're running a separate bulb for turn signals, all you need for brake lights to work is a complete circuit from the brake switch to the proper filament on the tail/brake light sockets.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!