64 1/2 D Code Coupe,
The brake lights stopped working on my 64 1/2 coupe. I disconnected the wires on the pressure switch under the hood and shorted them together (closed the circuit) and the brake lights came on just fine. So I thought it was the switch. I went and got a new switch, installed it, hooked it up, pressed the brake peddle....Nothing, No brake lights. I did upgrade from drums to front discs with an adjustable proportional valve. The stop light switch is connected to a port in the top of the valve. Before the upgrade the switch was in the single bowl master calendar, Now I have a dual bowl MC. The lights used to work after the drum to disc conversion. I switched to LED rear light panels a couple of summers ago. The brake lights worked great after installing the LED lights and they work great when I close the circuit as I mentioned above. It was in December 2019 that I noticed that they didn't work. Could it be the proportional valve? I'm assuming it's not the switch, old or new.