As ents mentioned, 21 and 24 are for sunlight/solar sensors and I don't think pre-facelift Avensis have those.
If you can hear the relay click, if the fuse is okay, and if the connectors to the blower motor look good, then it looks like your motor died.
The strange thing about these motors is that no one manufactures them except Toyota, but their failure is quite common. Either a new one or a used one.