Andrew, I think if you're getting a black screen, you've simply got a blown fuse for the cigarette lighter. Please check/replace that and try again before you post any further questions.
Next, if the fuse is good (does the lighter work?), what year is your truck? This is important information, because you MAY have bought an incompatible model, and, if so, nothing will make it work on your truck.
Finally, if you bought a "locked" unit, you will have to get the unlock code from Edge. There is no other solution. It is not something any of us can give you! They will charge you a nominal fee for this, but it's better than a unit that doesn't work, right?
2005 KR 4x4 SCrew 5.4, "Gott's" style CAI, PHP Gryphon CTS Tuned