Turn signal wiring mystery

[kraeburn]

Hey guys, I am only posting after scouring every thread on this issue on Pelican and examining the electrical schematics I have in the service manual. EDIT: Car in question is a 1986 930

Long story short I had some bodywork done this spring on the right front fender which delayed my usual maintenance work so I dove right in when I got the car in an effort to get it sorted prior to driving season. I believe the lights were functioning fine when I picked the car up but now I am doubting that. I basically got it home and started my projects.

All lights are function as normal right now after multiple days of troubleshooting. HOWEVER this was only achieved by removing one of the green/black wires from the lug which shouldn't make sense given the wiring schematics. It is really time consuming to disassemble all of the lights to troubleshoot so this is a hail mary before I button things back up again.

Relevant context:
--First I replaced a faulty turn signal switch, I tried the fix on it but ultimately elected to replace.

--I recall everything working fine afterwards but only went on a drive or two so can't be sure. I then launched into adding a aux power distribution block which I am doing to add some niceties like a magsafe charger, aux usb chargers and to power things like the AFR gauge and hardwired radar/dashcam. All of this works perfectly and is relayed off of the ignition. It is mounted on the inside passenger front trunk.

--Note that the light issues are still present even if I isolate the aux block, I really don't think this is the issue but its worth mentioning.

--I then started replacing all of the exterior bulbs with LED. It is a mix of spokeworks and other bulbs I got from a reputable source. After doing so, that is when the lights really started acting funky. With the lights off, turns worked fine. Position one, all worked except for front right. Position 2--no front turns and passenger headlight turned off completely when high beams activated. If I recall correctly, the running lights turned off with the headlights on as well.

--This began a process of checking all connections, cleaning, dialectric grease, etc. I think there were a few wires crossed but everything is hooked up per the drawings and what I've read on the forum at this time.

--I will also note that the car has been tinkered with over the years but it has largely been taken care of reputable shops (who knows) and one hack (me) who has owned it since 2018. I had some issues with the RF running light when I got it but a shop did something and everything worked fine until this year. This is relevant because it has IROC bumpers so the fogs/sidemarkers have been deleted. Also it has h4 headlights with what apprears to be a relay for the high beams--it doesn't look like some of the setups I've seen here and I haven't had time to investigate that end of things.

--When I ran into some roadblocks installing the LED's I did the interior lights and fixed the door contact switches. The passenger side was unrepairable as the wire was nowhere to be found, I even used a cheap boroscope and it simply isn't in there. I do worry it could be adding to the issues if it is shorted somewhere.

--The other problem which I couldn't understand is that my turn signal wiring into the fuseblock does not look correct for both sides. There were two wires coming out of the bottom of both. One of which has a ground short for the right side. My best guess is that it has been this way for a while as I have not touched it. When I removed the wire with the ground short, thats when everything started working again. Obviously, if I reconnect it, the fuse will blow immediately. I haven;t wrapped my head around whether I should move that one to the top--seems like a bad idea with a ground short. It seems like it should be the wire which leads to the rear tailight but that one is working fine with or without it connected!

--This is beyond my comprehension as I am no sparky but when I connect the ground fault locator to that one specific wire, I get no sound. I am still learning how to use it in general so that could be user error. It works great on known wires when I was figuring it out.

Thats basically where it stands now. Also the hazards work fine. I need to align the headlights again but the left side low beam definitely looks brighter than the right. I am really kicking myself for just diving right in and making changes but I'm here now. I'll also note that I have rechecked the connections for the turn switch and headlight switch twice as well as checked the relevant wiring for ground faults and the grounds for grounding.

Any input? I appreciate any advice and apologize for the length, it all seemed relevant for any shot at a diagnosis. I am truly descending into madness with this issue.

[911obgyn]

Grounds!
Lights will be a ground path if there is a bulb in it, but not a dead short, you can measure resistance and see what it ohms out at.