It has been some time since I disassembled and photographed that brake block, but I don't remember any springs at each end of the slide. I believe that had they been there I would have included them in the photo.

I also don't know how they would have figured into the scheme of things. It would seem that if there were springs at the ends they would prevent the slide from staying on once you released your foot from the pedal (and the pressure from the system). This type of a setup would only allow the light to flash on as long as your foot was applying pressure- it doesn't seem that that would signal a failure to the average driver.

I hope to find time to look into this by removing a brake block from one of the parts cars and opening it up for a look see.

Randy