If the remote was not working in the past... meaning the doors would not lock and the interior lights were not working.. then the fuse was blown... and has nothing to do with any "module", unfortunately most dealers do not know of this problem as it is very uncommon and is usually caused by the driver himself and not normal car wear... such has happened to me...

I do not know much about your defroster issue and if it has any connection with the remote and interior lights failure, but I do know that if the right fuse is replaced... the interior lights will work and so will the remote... this i am sure of... and if it does not work than it can only be the wiring which is extremely rare and absolutely could not fail itself...

You can change as many modules as you want it will do little for you...

The cause of this problem is that somehow the fuse was fried through circuitry mismatch it could of happened when a bulb was being changed similarly to how it happened to me...