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

Mart · 10-24-2023, 03:00 PM

Mike, unless I'm missing something, it can only be 3 duff switches. If you bypass the switch, the brake lights work. Do you have a known good switch on another vehicle? Try fitting that just to prove the point.

Is the switch fitted to the normal 40 type banjo bolt? If so there is no way it can not be seeing pressure if the brakes are working. Is the banjo bolt new of previously used? Is it drilled correctly?

If you loosen the switch slightly and pump the pedal, does fluid leak past?

10-24-2023, 03:00 PM	#4
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 9,240	Re: '40 brake lamp switch / master cylinder issue? Mike, unless I'm missing something, it can only be 3 duff switches. If you bypass the switch, the brake lights work. Do you have a known good switch on another vehicle? Try fitting that just to prove the point. Is the switch fitted to the normal 40 type banjo bolt? If so there is no way it can not be seeing pressure if the brakes are working. Is the banjo bolt new of previously used? Is it drilled correctly? If you loosen the switch slightly and pump the pedal, does fluid leak past?