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Discussion Starter · #1 ·
Yesterday while out for a drive in my 63 impala I was sitting at a red light and happened to look in my rear view and noticed in the reflection of the truck behind me I had no brake lights. However once I pressed a lot harder on the brake pedal they lit up.

I’m wondering if it could be the pedal or maybe vacuum? It has an original 62-63 booster that I had rebuilt but it has never really felt like it works as the pedal is still firm.

Any help is appreciated, thanks in advance.
 

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Not the best photo, and on a 64, but 63 is probably the same. Follow the brake pedal arm up and you can see it has a bit of bent up sheet metal bolted to the arm. That bit of sheet metal is what pushes the switch, which you can see to the right of the pedal arm. The switch can be adjusted with the nuts on it, so the lights come on with the desired amount of travel of the brake arm. Remember, it is a kind of backward switch, when you stop pushing it, it turns on. Also called Normally Open kind of switch.

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