mystery stall while driving ..and idle

I would guess an intermittent voltage regulator. Have you checked and cleaned your main ground wires? Have you checked the fluid levels in your battery? You may have a dry cell unless you're running a maintenance free battery. If your battery is over 5 years old, it may also be time to change it out. Batteries are strange like that. My Camry was hit or miss when starting. I changed out the starter and it ran fine for about 2 weeks. Then I went to the store one day and when I came back out.....nothing....totally dead. Worked fine 15 minutes prior when I left work, but now it won't even crank over the engine. Click, click, click. Luckily, I was at Walmart so all I had to do was take my old battery out and swap it in for a new one. Did that and everything has been great now.

There is a brake switch underneith the steering column up above foot area. Replace that and good to go