OldSpark (or someone else?) would you mind elaborating on how to power
If I want the tablet to be powered when the key is on, and also when the engine is started, I need to find two pre-existing wires in the truck? (One for acc on, and one for ign?)
>---switched power tab on relay
D> is supposed to be a diode, with direction
Then of course the power from the relay goes to the tablet, and the ground to ground.
I'm guessing the easiest way to plug the tablet in would be to get a cig-lighter to wall wart (12 to 120) adapter, and attach the power cord to the relay that way. Do I run that ground to the frame too?
This is where my electrical knowledge gets a bit sketchy...
If someone would be so kind as to help me out with a step-by step, or point me in the right direction, that would be fantastic!