It would lock the doors at 15mph but it did not unlock them. The 93 models was the first year for it and I am pretty sure it was also the last. It was really a stupid system. I can't think of any reason any one would want their doors to lock automatically so I killed that feature and removed the solenoids a few days after I started driving the car.
I wonder if the debounce resistors could be added right at the
MPGuino instead of taking the cluster apart to add them to the back of it? That would make it a whole lot easier for people to add if needed.