Red light on dash by clock

[tmorefield]

I have a 1970 Avanti II and I was wondering what is the red light in the dash just below the clock?

While trying to track down the mysterous button under my dash, I noticed the white wire coming from the button is connected to that red light. But the black wire from the red light is cut. I assumed the red light was a brake warning light but I am not so sure now.

Thanks,

Tony

[Gunslinger]

That is the brake warning light. It's wired to a switch on the proportioning valve which activates it if there's a pressure problem. It looks like someone may have tried to do something different with it with the mysterious button.

If you try and replace the switch on the proportioning valve, it's long unavailable. I've been trying for months to find a replacement for my '70 since it's having a body off reconstruction. It's the only part I've been unable to find, no matter how many suppliers I contact. Even Bendix, which designed and built the brake system on the car said they got out of that kind of part years ago.