Join Date: Jul 2005
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Quickest and easiest way is to try another known working identical relay.
If the dipped lights work you know the other relay was faulty. Otherwise you either need to know how to use a multimeter and have some electronic/electrical knowledge and have a 12volt power supply. The relay is basically a high power "switch".
Currently in SportTourer's garage:
2010 Laguna III SportTourer Initiale Tom Tom.