Join Date: Nov 2008
I just got done tracking this demon myself. I tried everything you saw above and the lights stayed on.
I read somewhere that one guy unplugged the connector from the bottom of the BCM (there are 3..2 on the rear, one on the bottom) This worked for me, but it also meant that I had no dome lights when I opened my doors, since the sensors for all the door switches are in that bundle.
Well, I wasn't happy with that. It was clear that one of the 10 or so wires in that bundle was what was causing it, since plugging it back in resulted in the dome lights failing again. So, I went whole-hog. I cut the whole connector off and started reconnecting the wires one by one. Turns out that all my door switches were just fine. The problem was in the VTSS Disable (Yiolet/Yellow) Wire. If I connected that wire, the problem came back, so I left it hang there.
What this means for me, though is that I cannot disable the VTSS with a key in any of my locks. I can ONLY disable it from the fob. I plan to do some more tracing of this issue in the future. I checked the wire coming from the harness and there was 6.xx volts on it. I am still waiting on my FSM to arrive, so I will check this in more detail later.
Long and short of this post: Pull that connector. If that solves the problem, check to see if you get some goofy voltage on the Violet/Yellow wire. If you do, try disconnecting that wire, but make sure you leave enough on the ends so that you can reconnect it later.