Failed rear window heater.

Hi

recently the rear window heater ( dimister) has stopped working on my 02 lander'. After consulting the manual blurb, i checked the fuse which was fine. then replaced the heater switch , still no joy. after more consultation of the manual i replaced the relay. still no joy .I see by the wiring diagram the heater is controlled by the CCU. but the CCU controlls a lot of electrical functions, so i'm at a dead end!
Has anyone out there had heater problems....please.
Ta muchly.
Al.

PS I'm new here Hello all.

PPS ive' probably posted this in the wrong place..duu!!...

probably the contact has broken off the window, strip off the back panel and look see, repair with good glue and copper foil, can buy self adhesive foil from model shops.