Chaps, Have any of you done this to your Insignia/Vectra (wiring can't be that much different)? If so, does the wiring for this exist behind the panels? Unfortunately Vauxhall were reluctant to give me a wiring diagram for this vehicle and suggested I took it to a main dealer (yeah right!). I bought a socket out of Halfords as Vauxhall wanted £22 for one. Again dealership rip off merchants! Thanks in advance!