If, at this point, you get the impression I don't like common ground systems, you'd be correct. Many times, I've gotten a component or device working by simply running a wire to a known-good ground. In recreational vehicles, trailers, and boats, I definitely prefer ground wires to common ground systems.
Alternatively, to avoid running lots and lots of ground wires, I will use a dedicated ground bus, which is a heavy gauge copper wire that serves the same purpose as a common ground but is more reliable and easier to troubleshoot.
Later in this discussion, we'll look at how to ensure you have robust, reliable ground-side connections. We'll also look at building a ground bus system versus relying on a common ground system.
