Check your original units part number  Works fine and comes with a 30 day warranty.  A defective cruise control module is one of the primary causes of cruise control failure in these cars. This unit is located on top of the driver side footwell vent of 9000's, it is held in with a single clip. If your cruise does not work, It's a good idea to check for vacuum leaks and that the pedal switches are still working. if it still does not work, 9/10 times it's because this ECU has failed. Don't go around in your classic 900 with a non working cruise control system, there is a good chance this is an easy fix and you will have working cruise again! Thanks for looking and good luck!