New owner, first of many questions. Acc Fuse

[gcfishguy]

First, hi!! Started riding 6 years ago, have changed bikes every year while I try new things and see what kind of riding suits me. Can only have one bike so I'm getting an idea of what I need, versus what I want...
Anyway...I've found forums related to the other bikes very helpful, so I'm assuming this one will be the same...Reading through several pages of posts and articles last night tells me that pretty much everything I'll ever need to dig up will be right here... Also, fair warning, I get wordy. But, I know that more information is better than less when you're asking for tech help across the interwebs, so more it WILL be...

Just got the Wing (86 GL1200A) and got out for one wet, cold ride and am now waiting on some parts and nicer weather. (A clutch rod bushing and new lever to start with...actuator rod is worn right through the bushing and into the lever) ...Fun on the biggest bike I've ever ridden, first time out, cold and raining, and the clutch is either off or on. haha

So...Just went looking for a spot where I can add a relay for powering a cell phone charger when the ignition (or ACC) is on. And, I found my first "Now what did someone do here..?"
On the fusebox under the faux tank, there's a wire hooked to the positive terminal screw, and heading off somewhere that I didn't trace out yet. But, when I was poking the fuses, checking for power with the key on ACC, then with ignition ON...I found a mystery.
The topmost fuse (labeled 10A ACC) is blown. It's only hot on the right side with the key on ACC (because yeah, it's blown) but if I switch the key to ON, it's hot on both sides. That ain't right...
I took a spare, and with the key on ACC I put the spare in and all the key-on-engine-off lights came on in the dash....so it's backfeeding the IGN from the ACC.

The thing is...everything seems to function correctly...as far as my limited poking around has shown me... like, the radio comes on on ACC...so with a blown ACC fuse, that tells me that a PO must have changed something to feed it power from another circuit....I thought of that mystery wire on the ACC terminal, but it seems to head towards the back.

Again, everything seems to work, and if I hadn't checked the fuses I wouldn't even have known something weird was going on. Someone has worked around a problem, and things are not as they should be. I'd rather fix the issue and put it back to 'stock' if possible.

So...all that to say, Does anyone remember hearing about other Wings doing this same thing? Common thing that I just wasn't able to find with the search?
I'm just posting for curiosity....I have not had a chance to really start digging into tracing stuff...but I will say that the appeal of this bike over others it that it has NO accessories added to it, no chrome rails, no 30 extra lights, no mystery switches, etc etc. Aside from this 1 mystery wire, and another one leading to the trunk where he had to run an aux battery after a stator failure on a long trip.....it's essentially the way Honda built it and hasn't been hacked up.
And just thinking about it now, I'll bet that mystery wire DOES lead to the trunk, because if he wanted to power the bike off an aux battery, powering that fuse panel would be the prefect way to do it.
Hmm...

And no, I'm not just looking for someone to fix it for me... I'm working from home and am at my desk, but going antsy because it's sitting there in the driveway and I can't work on it, aside from sneaking up for 5-10 minutes at a time before they notice I'm gone...

[gcfishguy]

Update...the mystery wire on the ACC screw terminal is feeding the fuel pump wire just before the plug.
So, I assume something happened to the fuel pump + wire in the harness and they had to bypass it.

[Rambozo]

Well since the fuse was blown and there is power on both sides when the key is on, it's obvious that the stock fuel pump circuit is working. Why someone would do that is more a question for philosophers than mechanics. GoldWings get electrical molestation more than any other bike I can think of.

[gcfishguy]

Well, no.... Sorry...I did a lot of rambling...
Top fuse...10A ACC Blown. With the key in ACC, it's hot on the right side. With the key ON, it's hot on both sides. So it must be back-feeding.
Also, when I had the key on ACC, I stuck a good fuse in and it brought up all the lights in the dash, so it must be feeding the IGN circuit also.

The fuel pump thing and the wire on the screw terminal are another thing. Likely a broken wire in the harness so they fed it power partway down the line.

[Rambozo]

I understand it was backfeeding, but that means there is power on the wire from the fuel pump that was jumped to the ACC terminal. I missed the bit about the lights not working until the fuse was replaced. So there are clearly problems. I would go over the wiring diagram and do my best to put it back to stock and fix anything you find along the way. I'm thinking that there is some high resistance in the main feed, so that bypass was put in. Without the ACC fuse it reads voltage with a meter, but probably not enough current to run everything. That bypass was an ok side of the road patch, but now it's time to fix the real problems. Also these bikes are well know for losing grounds, and then backfeeding the ground via a lamp filament or other load. The ACC wiring is really not large enough to expect it to run everything. The various plugs and connectors on a bike that old are often in really bad shape. Sometimes the only thing required is a good cleaning, but if there has been high resistance for any length of time, you will often find weak spring contacts and melted plastic. The dielectric grease Honda used has usually become mud or cement by now. I'm sure you will get it all cleaned up and sorted out.