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post #4 of (permalink) Old 24th November 2005
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The heated rear screen relay should be located in the passenger compartment fusebox.

If the light on the display is illuminated when you press the demist button, then the relay has tripped in and is supplying 12 volts to both the light and the rear screen. If the display is illuminated, the relay is OK.

Therefore, you should have battery voltage at the rear screen.

I suggest you remove the tailgate trim panels and probe for voltage at the tailgate wiring connectors. Also check the earth connections very carefully.

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