03-09-2020, 02:33 PM
The connecting spring/wire was missing from my Ruby when I got it as a barn find twenty years ago. The brake light switch has a certain resistance and movement of a few mm. So I found a suitable small spring and tied it on in series with a shoelace (could have used wire) such that the first movement of the pedal put the brake lights on, but the rest of the movement was taken by the expansion of the spring. It took a couple of goes to adjust the length of spring and lace to get the tension right, but it has worked for ever since.