Make a good metal contact on you car, and ground to that. I wouldn't ground anything to the frame of the head unit.
Im putting together my first CarPC, and I'm about ready to install everything. I plan on leaving my head unit installed and running the computer through the auxillary in port of the head unit.
I've read some posts about ground loop noise, and I was wondering if I can avoid all that by just grounding my CarPC to the ground cable on the back of my head unit. Has anybody done this? (yes i did a search for this very thing on the forum) or is this a bad idea?
Any feedback is appreciated. Thanks.
I think he means the itty bitty wire that goes to a ground from the HU correct? If so, then the answer is no. Way too small of a guage. But trace that wire down to the chassis, make sure it is free of crap, and ground there.
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Try your install first and see where it goes from there. What you're trying to do with a common ground is equalize the "affinity" to ground so one component is not trying to ground through another thus inducing noise.
Ground loops can crop up for the weirdest of reasons sometimes...............
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