Changed the scruffy rear wings on my old ex racer. Unplugged lights, plugged back in, all good but no brake lights. It passed mot last weds so I'm assuming they worked then. I've put a multimeter on one side of the pedal switch and it only shows a fraction of one volt? With the pedal down and the switch open it reads the same voltage at the other side. So it's like the switch isn't getting a 12 voltage feed, but is getting a very small feed. Help please, I'm lost now? Cheers Ed