These two wires must be making contact somewhere? I need an automotive electrician (and a hug?).
I can't give you a hug, but I can share a little insight... Sometimes it's best to think in terms of gremlins. It's useful, as you troubleshoot and do repairs, to pay your respects to the gremlins. Realize that as you fix one problem the gremlins will scoot into some other nook, and cause problems over there instead. Sound familiar? They don't like to be dissed, or even just ignored. You may wonder why I'm writing about fanciful creatures that remain hidden from most people's sight, but wreck havoc nonetheless. It's because I'm a freelance computer guru, so I know whereof I speak!
Just about everyone can tell you stories similar to this one, taken from real life:
It was a typical cold, rainy, winter day in Northern California, and my '82 X would occasionally make this short, but loud screech. We're talking about fingersnails over the blackboard like screech, only louder. "SCREEEEEECH!!" It sounded like I was slamming on the brakes, trying hard not to hit someone, but it would happen, randomly, even while the car was waiting for a green light to appear. I don't like it when my cars look and feel old, or do things that remind me that they
are old. My cars ought to remind me of the fun and joy of living, not the specter of decay, and mortality. This screeching had been happening a couple of years in a row, and always started when the rainy season started. That was a good clue, but not good enough. I checked the alternator belt, tightened it, replaced it. I even replaced the alternator, thinking a bearing might be going bad, but nothing made the random screeching go away. I took the car to Benedetti, to see if they could track down the problem. You can probably guess what I'm about to say next, because I'm almost certain something similar has happened to you, too. Of course my '82 X didn't make even a peep the whole time the folks at the repair shop were looking at it. Problem unsolved, I drove my car away. You can probably also guess that it made a loud screech just as the repair shop was out of sight, which is exactly what it did. It's a well-known fact that gremlins love to hide when technicians are around doing their poking and probing. You can almost put betting money on gremlins, and could make a decent living gambling on their antics. Except that nobody in their right mind would bet against you! And, yes, this happens to me as a computer tech, too. A computer will behave beautifully on my workbench, and be the picture of perfection. Back home, or back in its office -- not so perfect after all. I hope you'll forgive a momentary digression: One of my clients had a small Dell tower, which refused to boot up. I took it home, to diagnose on my workbench, and found it worked great. It had no flaws as far as I could tell. Back at my client's home the poor little thing still would not boot. WTF? It was her old Lexmark printer. As long as its USB cable was unplugged, the computer would boot up just fine. Plug the USB in afterwards, and the Dell was still happy, and the Lexmark would still print just fine, too. There was something amiss with the USB circuit in the old Lexmark -- not enough to make it fail, but enough to cause problems --
that's where the gremlin was hiding! Now back to my '82 X... It was pointless to turn around and bring it right back to Benedetti. We all know what would have happened -- we would have heard the crickets chirping, it would have been so quiet. I finally got the solution from an unusual source. I bought a second X1/9! My '85 Bertone still had a water splash guard between the road and the alternator and its rubber belt. That prevents too much water spray from reaching those areas, and making them slip, maybe even screech? Yes, indeed. My '82 had the correct mounting holes for the splash guard -- even had the metal part of it, bent upwards, out of the way -- but it was missing the important plastic and rubber pieces. Since I was not planning to drive the '85 in the rain anyway, I let my '82 borrow the parts from my '85, and then my daily driver no longer screeched when it started to rain. I was happy, the gremlins were happy (they're currently hiding in one of the 7.5A circuits of my '85 Bertone, and some of their cousins are in your turn-signal wiring, too). I wish you much luck, and assured success!
EDIT: Speaking of gremlins, when I was a boy I loved the AMC Gremlin X! Here's a photo of a 1977 example. That happens to be the same year I started lusting after X1/9's instead. You could say that's when the Gremlin X became my ex. The true X romance would begin 20 years later.