Remove the bumper & existing headlights. Drill through the empty 2 positions in the headlamp loom connector. Fit appropriate female terminals into the empty holes. Connect these 2 new pins to the 1.5mm brown earth cable already in the loom or to one of the chassis earths. Use a terminal extractor and swap over pins 7 & 8 in the loom connector.
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opel insignia 2009 bi xenon headlights