Thanks guys. I did not install the SmartCraft sender in the oil tank, so I should still have the original horn alarm. What concerns me is that before I installed the SmartCraft system, the horn alarm sounded on me once before when I could still see a little oil in the botom of the remote tank. It was below that level (I couldn't see anything in the remote tank) and I still didn't get an alarm, so I was concerned that the SmartCraft install may have somehow overiden the original horn alarm.