The 12v DC outlet in the Elise doesn't hold a 12v plug very well. The plug just wiggles in there and contact is spotty. Upgrading it to a more solid outlet for my '06 Elise was easy, and cheap. You'll need this:
SOURCE UPDATED see Post 40: https://www.lotustalk.com/forums/f129...9/#post5595234
RadioShack product 2062272 link dead see linked post above
Plus some electrical tape, and a small flat head screwdriver.
1) Remove the black cover, labeled "1" in the picture below. This takes one screw
2) Inside, remove two more screws (don't drop them!) so that you can lift the grey holder up that holds the outlet.
3) Remove the plug with the black and purple wire from the back of the outlet (just pull).
4) Now remove the whole grey housing, #2 in the picture, then pry the old outlet out of it.
5) Take the Radioshack outlet and push it back in there. It should fit without any modification to the housing or the outlet itself.
6) This is the trickiest part, and really not that hard. Take the small screw driver and push both pins out of the plug, which you removed in step #3. This takes a little wiggling, but it can be done without damaging the plug or the pins. Be careful, the +12v line is still hot even with the car off. It is easy to short, and then you'll have to put a new fuse in. You probably should just take the fuse out or disconnect the battery when you do this.
7) Put the grey housing back, and attach the now loose wires to the radio shack outlet. The connectors on the wires should fit the new outlet perfectly. IMPORTANT Take care to attach the 12v wire (the purple) to the correct plug on the outlet. It has to go to the plug that connects to the inside of the outlet.
8) To prevent shorting when you put it all back together, wrap some electrical take around the +12v connector. For me, this was absolutely necessary. The back of the outlet sits really close to the metal frame that you screw the grey housing to. You can see this in the picture on the right.
9) Put the whole thing back together.
10) Test it with some cheap device first. I'm not responsible if you connected the +12v to the wrong plug of the outlet and blow up your V1, or so.