Soooo... I had noticed in my truck that the 3rd brake light isn't working, but thought that it was due to the stupid euro regulations that forbid the lamp, so I didn't investigate it, thought it was just deactivated. But then, some time ago I got an LED 3rd brake light with them cargo lights to replace the old one because the regulations have loosened in Finland lately (Finally we can have DOT lights, yeeeey). Aaand I opened up the light to take it off and noticed that there were no bulbs inside the light, and that the base was blackened from above where the bulbs would have been sitting. Odd, I thought to myself. Then I went on to plug in the LED light and was very happy to see it come to life. That's when I realised that the power was off. So it seems as though it is getting electricity from somewhere, but there are no auxiliar cables coming from the batteries or anything and as the harness travels inside the cab, I haven't had the time nor place to start investigating it. Any ideas?