To check if you have a problem first remove the fuse box cover.
Then locate the tab at the back of the fuse box.
Pull it towards you and the fuse box will hinge down.
Examine the fuse for the heated rear screen and if it has melted, as in this case, then you need to do this modification.
Undo the white fasteners along the top of the boot, and there are some poppers along the base of this section of carpet which need to be removed.
Remove the carper at the front of the boot.
Now you need to locate the heated rear screen wire and cut it, it is light brown with a white tracer.
If you scrounge a second hand relay holder and fuse they can be clipped onto the relays that are already in place.
On top of the +ve battery terminal there are a number of studs that can be used to attach the new power supply too.
Here is a very handy earth for the relay, it is also the MAIN EARTH for the car so make sure you tighten it up properly.
On some relays you get this handy wiring diagram, terminal 30 connects to the battery +ve via a 30 amp fuse, terminal 85 goes to the brown wire with a white tracer that comes from the fuse box that you cut earlier, terminal 86 goes to the earth that you have chosen in the boot, terminal 87 then connects to the brown wire with the white tracer that goes back up to the rear screen.
The relay you need, part number 11130287
A relay base with wires off a scrap Alfa Romeo (look round the battery or fuse box)
