The Ford Barn - View Single Post - '40 brake lamp switch / master cylinder issue?

deuce_roadster · 10-24-2023, 03:26 PM

I would swap out the MC. Maybe the fluid you see coming out the back isn't sufficient pressure to cause the switch to operate.
I would also try to operate the switch with air pressure and see if the lights come on.

10-24-2023, 03:26 PM	#5
deuce_roadster Senior Member Join Date: Oct 2011 Location: Shelton, WA Posts: 4,043	Re: '40 brake lamp switch / master cylinder issue? I would swap out the MC. Maybe the fluid you see coming out the back isn't sufficient pressure to cause the switch to operate. I would also try to operate the switch with air pressure and see if the lights come on.