Here are the wires I tapped into for my light project (4th picture down):
https://sites.google.com/site/brickpigs2011xb/home/2---light-frenzy
Here's how I added underglow:
https://sites.google.com/site/brickpigs2011xb/home/15---light-frenzy-2
Access those wires by removing the drivers knee panel (READ the disclaimer):
https://sites.google.com/site/brickpigs2011xb/home/ht01---rm-drivers-knee-panel
Have fun and post pics when you are done!
https://sites.google.com/site/brickpigs2011xb/home/2---light-frenzy
Here's how I added underglow:
https://sites.google.com/site/brickpigs2011xb/home/15---light-frenzy-2
Access those wires by removing the drivers knee panel (READ the disclaimer):
https://sites.google.com/site/brickpigs2011xb/home/ht01---rm-drivers-knee-panel
Have fun and post pics when you are done!