brakes lights are stuck on. changed brake light switch and muilt funtion switch.but they are still on

Welcome to AF
Does the turn signals work right and left rear.
Did they go out when you had the multi function switch unplugged?
Pull brake light fuse and see if they go out?
Did you change the right brake light switch?
Does it have a trailer plug in on it?

thanks for the sugggestions. i found out that it was the relay.