2013 Edge SEL Audio/Start issues/in depth detail provided

[CableguyJJS3]

Hello all, hopefully the experts can help me here. I have a new to me 2013 Edge 3.5 AWD SEL standard key ignition Sync 2 audio/nav. Sitting in the car, key in the ignition, start the car as normal, key returns to RUN position, Sync module lit up, everything appears to function normally, no audio from any audio source. Move the key back to ACC position, car shuts off, radio and all other source audio returns, move key to OFF position, audio continues to function normally. Remove key from ignition, re-insert, audio cuts off until key is moved to RUN position and then back to ACC or OFF, car does not need to be started for audio to return. I currently do not have any codes in the APIM or ACM. At the advice of an audio guy I met, at one time I had codes in the APIM, B1215:00-28, U016A:00-28, U0184:00-28, he recommended ACM replacement, I did that, no luck. I did a clear codes and on demand self-test with Forscan, currently no codes in the APIM or ACM, but I've also not driven the car much, so I don't know if there is needed drive cycles to bring any codes back. Any help with this is appreciated. 

 

Start issues, in trying to trouble shoot the no audio condition, The key insertion leading to the audio cutting out, led me to believe there could possibly be a short in the ignition switch. So, I went after that, as I was opening up the dash to get to the switch, I noticed I was not the first one in there. I pulled the switch out and found an added wire spliced from pin 7 of the ignition switch, IGNITION/START circuit, ran directly out through the firewall and underneath the under hood fuse block.  I flopped the fuse block over, that wire is tied directly to a wire that used to be tied to one of the main pins of the start circuit relay, they cut the wire just below the underside of the fuse block and spliced the car side to the wire coming from under the dash. I've tried connecting it back as it's supposed to be, car will not start until its wired back to the jumper wire. 

 

I don't entirely know if the 2 situations are tied together, or just separate issues. The audio I believe is somehow tied to the PCM wakeup circuit, through testing I determine key insertion activates a pin in the switch that leads to BCM fuse 18, Keypad illumination, Brake shift interlock, Start button LED, Passive anti-theft system, Powertrain control module wake-up, Second row power enable, the fuse has been tested and is good. The no start unless hot wired condition, I'm kind of at a loss on. I did another on demand self test of all the modules in the car today, in the BCM I found 2 codes that hadn't previously been there, C0040:12, C1D00:11, those come back to brake light switches best I can tell. I had already swapped the main brake light switch with a known good one and that didn't seem to make a change. So not sure where those codes came from. 

 

If anyone has any suggestions on where to look, or what to troubleshoot, or what to get into, please let me know. I purchased this car for my parents as theirs is falling apart, so I'm going through this one trying to work out all the kinks so I can get it to them. Any help is appreciated and gladly willing to pay for meaningful conversation and advice. I know it's my first post here, but I've been on different forums for years, been wrenching 40 years, I'm pretty handy, but sometimes these electronics get me, And I despise parts changers and chasing blindly down paths that lead nowhere, so some pointers on where to look or test next, please send them along. Thank you.   Jim