Thanks Audtatious. I found the fuse and it was blown. Replaced it and it worked, but later it wasn't. I suspect the ballast so will order later. At Rockauto it's about $240, Infiniti online parts source and Autozone it's around $350, but I can find it for about $50 on Amazon. I take it the Amazon parts are some cheap knock-offs? Oh, by the way, the fuse is in the larger box next to the battery not the one your arrow is pointing at. It's a bit of a bear to get at as you have to use a tool to get the cable free so you can actually have access.