[quote=DRJ]If you buy a cig. lighter adapter all you gotta do is hook up the power lead (usually red) to the accessory and the black to ground, then you've got your switched power

personally I'd tap into the ignition wires under the dash
You didn't specify the year truck you've got...
so here's the wiring for 04+ & 97+ and a pic of the wiring for 04+ ignition wires
04+ HU power wire colors
+12V DC Battery(Constant) Lt.green/violet
Switched Accessory Pink/black
Ground Black & black/light green
97+
+12V DC Battery(Constant) Lt.green/violet
Switched Accessory Black/pink
Ground Black & black/light green
Sorry.........just making sure here.....would I connect the cig. adapter "Power" to the pink/black or the Black/light green............
I have a 2004 Screw and your post and picture is confusing me just a bit (probably me)...your post has Switched Accessory as pink/black but the picture has it as Black Green.....and keysence as pink/black.........just trying to bet everything in order before my install..........Thanks again for all the HELP......