My '93 SHO has the usual cracked buttons on the EATC. I want to upgrade to the model with the hardened buttons, but don't know which unit to use. A friend who works at a Ford dealership gave me a unit he thought would work. The unit itself was slightly narrower and shorter than the 93 unit, but it did have the larger buttons. Everything plugged in, so I thought it would work. After installation, it powered up normally but the blower motor runs at high speed even when the EATC reads "off". I didn't check to see if everything else worked because I thought the unit might not be compatible with my car and cause some other problem. After removing this unit and re-installing my factory unit, everything was back to normal. I don't know what vehicle the unit I used came from, but the Ford number on the decal is F5PF-18C615-BBSR. The word "ORANGE" is also printed on the decal. Does anyone know why this unit wouldn't work? What part number should I be looking for and what vehicle come equipped with it?