check a wiring diagram here - the brake lights should get their power from an 'always on' power source, usually a terminal on the light switch, but not the same one as the tail lights ... probably right where the power lead connects to the light switch

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics