Just to update,,,, Ive repaired the three broken wires. the others looked fine. Pushing the heated rear window button no longer opens the tailgate im glad to say, heated door mirrors still not heating up though. Ive checked the cables between the a-frame & the doors, they all seem fine. Bit strange that both mirrors dont heat up. A further issue was also solved. The tailgate would not open by pulling the handle. I could here the motor trying to unlock the tailgate but it remained locked. Repairing the wires has sorted this. Any other ideas for the heated mirrors? Thanks Dave