Heres wiring diagram for aftermarket radio install for 1993 and older evo baggers
I put an aftermarket radio in my 89 electra and with just using the axxess metra adapter and this diagram got volume and tuner on bars communicating. No pink wire splice needed
Did you used the 99-9600 bracket? do you have any pics of the wiring and install?
Welcome to the forum from the people's republic of Massachusetts!
I would almost guarantee he used the 99-9600. I did on mine and it went on ever so smoothly. Many people have an irrational fear of wiring, I did and once I saw the rat's nest that the p.o. hacked up I knew I had to dig in. It actually became a little satisfying doing a nice job and getting things working correctly.