Hi I'm going to be building a car PC. I'm quite experienced with computer building but not so much with cars at all, in fact this is my first car (jeep grand Cherokee). I understand how to build everything but am not sure how the power for the system works? is it powered off of the car battery or is there some kind of external power source. Also wondering how i can set it up so i can view diagnostics information about the car. any info anyone has is greatly appreciated.
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