Emergency Flasher , wipers , turn signal what do they have in common

[RICHR]

I havent drove the car in a short time and starded engine and drove off.
wiper went on and it wouldnt shut off . That was fun then I put the turn signal on and that didnt work.turn right on then left . that didnt work I pushed the emergency flashes on that didnt work Cruse control didnt work either what would be the most common relay or fuse its a 1986 560 sl can any body help????
Richardr