Trunk light could still be on. If the lid has been closed for say 5 min or more, open it and feel the bulb / lens. If hot the light is staying on.

Below the latch there is a slot where you can trip the "trunk light off with lid up lever" with a key or similar object. The trim around mine has come off making it easy to trip by hand.

As for the DVD, some of these are "fixed" to work outside of normal channels, you need to follow their install instructions exactly. Are you trying to access the electrical diagrams? If so, there is an AutoCad viewer that needs to be installed first.