schematic last page here ... the feed for the tail lights goes via the signal switch, which simply interrupts the selected light, your lack of brake lights is likely some other part of the brake circuit - if you don't have the shop manual wiring diagram, the Chevy one might work

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 & Rust-a-holics Unanimous parking lot