Whoa! That circuit only has a 10A fuse. It supplies power to the radio memory, door chime, interior light and possilly the keyless entry if it has the option. If there was a fire and it was the dome light that caused it then I have to wonder what happened to the fuse. Check the fuse block and make sure the proper fuse is in the fuse block. Long story short when a fuse is shorted it opens and prevents current flow. Something else happened, hard to say what. Replacing the fuse with the incorrect fuse may have made the wire the "fuse" thus creating a heating element and causing the fire. Only a guess. Check the overall condtion of the vehicle to see what else might be bad.
