MGF and MG TF Hardtop and Hood Electrics - Heated Rear Window
If your car is pre-2005 and has not been fitted with a hardtop before (or if you wish to fit a hood with a heated glass rear window), you will also need to fit a switch and a relay in order to be able to operate the heated rear window. This is not a difficult task with the correct items to hand - you will need a relay and heated rear window switch (conveniently available together as an installation kit, which also includes illustrated instructions). The wiring, connector plugs and relay socket are already fitted, so no wiring conversion will be required.
2005 on MG TF's already have the switch and relay fitted (albeit a different, smaller relay) in order to operate the heated glass rear window in the hood.