1989 shadow
when you turn the ignition off (with the heater on) the heater stays running,
when you pull the fuse for the heater it also still works even with the car off
the heater control and variable speed all function properly, just it works all the time and the ignition being off doesn't stop it

tried replacing ignition switch ( no change )

is there something thats supposed to turn it off that may have went bad ? like a resistor or relay or something because i i cant figure it out