I would like to rewire the heated rear window and get rid of that box of tricks that houses the radio amp too.
I heard it burn out this morning as I think it got damp from where I had left the boot rest resting down rather than shut for the last 5 days

This is about the 3rd box it is on too due to the previous 2 breaking.

How could it be done so I don't need the box?
I think there are two skinny wires that come in from a relay in the fuse box to the amp under the parcel shelf and then 2 fat wires out to the window.

What does the box actually do? Does it ramp up the ampage somehow?

I have a roof aerial too for the radio so not bothered about that.

Cheers,
Jack