Ben,
The '66 has a hydraulic brake light switch under the
hood, as you already know.
If you pull the two wires going to the switch off, and
use a short wire to jumper them together... you should
have brake lights on. I suspect since you already replaced
the switch, this is not the cause.
Next thing: Hook up a test light. Use my funky "Tom's dual
filament test light bulb with a couple of wires attached"
[TDFTLBWCWA for short. Been reading too many engineering
manuals again]. ONE wire to the switch should go to the
tail lights, the other wire should be wired to a fuse.
I suspect the switch does not have power to it... try removing
one fuse at a time, cleaning the contacts, and reinserting it.
The early cars, with a fuse box under the hood, always seem
to suffer from a little added corrosion to the contacts.
Brake light power might be the WIPER fuse. Last one down.
It was something odd like that.
Cheers,
Tom Walter '68 2000
Austin, TX
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