Q: 1998 Buick LeSabre sat for awhile and battery dead. AAA jump started and 9 hours later at 1 AM on a cold winters night the horn a

alarm and lights came on.Steady horn not intermittent beep of newer cars.Finally got it to stop by jamming the key deep into ignition.20 minutes later happened again & couldn't get it to stop.Called police & we unhooked the cable.AAA jumped again & drove to mechanic Ralph's in Vandalia. Replaced battery, still under warranty &ran tests but could find no drain Next AM battery was dead, alarm had gone off in the middle of the night. They thought it was security module & unhooked it.Suggested I take it to dealership so could possibly replace and program. Arbogast in Troy, OH didn't seem esp. interested.Were to look at it Monday.Heard nothing so called at noon Tuesday &was told that every time they started it, it fired up. Of course, module was still disconnected! Reconnected,drove home. 4AM Xmas did it again. I would leave disconnected but no horn,unsafe can deal w/no elec locks SOS AUTOMATIC TRANSMISSION NOT MANUAL cant change in edit

My car has 99189 miles.
My car has a manual transmission.