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post #2 of (permalink) Old 28th December 2009
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Re: Laguna RT Sport 1996 - REAR DEMISTER PROBLEM

The only common problem I have come across on the Lag 1 rear heated screen is damaged/melted contacts in the multi-plug that you have checked,so other than that it's going to be a case of tracing the wires back from the relay.You should have 12 volts to one side of the window,an earth to the other side.You can check this with a test light or multimeter,you can also carefully (the elements can be easy to damage) check the voltage across the window which should be 12 volts on the feed side and then gradually down to 0v the earth side(i.e 12 volts,then a quarter way across the window will be 9 volts,then halfway across will be 6 volts etc....)
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