I noticed that the rear lights of my Matiz do not work (Or rather the guy behind me in a thunderstorm noticed...). The brake lights are fine, though. This is what I did:
- checked the bulbs, they both look okay, but I changed them anyway, just in case.
- checked the fuses and relays in the fuse box under the hood, they are all okay.
- took a voltmeter to the sockets, and -- surprise -- read ~0V.
- ripped apart most of the interior of the car to check the wiring, which is okay
I had no luck on finding a wiring diagram for the car.
I'm totally at a loss for what could be wrong.