Going through some of them VW electrical troubles right now; I've searched the forums and Google and cabby-info without much luck so I'm crowd-sourcing this one.
I'm basically looking for a "map" of all of the wires, grounds, sensors, and major electric components in the engine bay. I am by no means an electrician or an electrical engineer, so the less complex the diagram the better. I've been studying the Bentley diagram but it's a little too arcane for my skill level and isn't must help answering what I'm trying to figure out anyway.
It needs to be relatively easy for a layman to decipher and specifically focused on the engine wiring harness: battery, grounds, fuse box, ignition switch, coil; along with every engine componet that is attached to a wire; alternator, radiator fan, mass airflow sensor, etc. I'm not concerned about the voltage of the tail-light relays or the stereo or anything like that.
Ideally I'd like an image or images with a top-down or isometric/exploded schematic. I've found a million diagrams of the vacuum system...
What I need is something exactly like that one, but for the wiring harness. Does it exist? Perhaps someone could make one if it doesn't?
This one here is close I guess, but it's still a little vague/incomplete for my taste, not quite helpful for what I'm trying to figure out:
This one is pretty close too; I like that it's straightforward and color-coded and shows most of the major components, but I'm pretty sure it's not my system.
I know, I know... most if not all of the wires and connectors are (thankfully) only designed to fit in one place. There's no way to plug your knock sensor into your hall sensor, for example...and most of the grounds are easy enough to find and access.
Basically for those curious, There is at least one specific wire that I'm not entirely sure about. It's a black wire with a (female) clip-on terminal and I have no idea what it does, and there is also a (male) clip on terminal attached to the bracket with some plastic or rubber looking piece... since this is the last remaining wire and the last remaining port I'm assuming that they go together. Is this yet another ground? I already have a different (brown with black stripe) wire with an eyelet terminal that attaches to a little bolt on the valve cover. How many ground wires are supposed to be coming out of that main wiring harness that routes from the fuse box? Because I count about 2; one black, one brown.
but yeah... for me and anyone else who gets easily confused by jumbles of wires and ports, it would be nice if an easier-to-read diagram of the Digifant wiring existed. If it doesn't exist yet, maybe I'll make one myself once I figure it out.