The heater (demister) for my rear window quit working some time ago.

When I activate it nothing happens. The light comes on for a few minutes as usual, but no heat to the window.

Radio reception is worse now. Windshield wiper/washer interferes with radio signal now. Also, sometimes braking makes the the radio crackle for a second.

What am I looking at here? Relay under the rear seat, or are the wires back there the culprits? Any clues?

Thanks in advance.

Niels.