bb1122

Hope someone can help, have yet to find a solution to this problem....
My 2001 Rx300 was in the shop having some front end body work done, to my understanding the battery died at some point while it was there and had to be jump started several times . I picked the car up at noon and parked it in my driveway. I put a battery charger on i, closed the hood and locked the doors with the key fob. At 5:00pm I heard the horn going off. I went outside and turned off the noise with the key fob. The next morning I took the charger off. and drove the car around, worked great. Then 3 days later the horn starts honking again, at 5:00 pm, it stopped by itself then started again 14 minutes later. I turned it off with the key fob. Started the car, drove it around parked, and locked it. Then at 11:00 pm the horn started honking again. I turned it off with the key fob. opened the hood removed the fuse for the horn and horn Relay from the fuse box. I went back to bed. What can I do the make this random honking stop?