Good Morning, Bartamos,
Good news.
After the last unsuccessful attempt, before getting too deeply involved, I went back to the old, tried and true method of trying the simplest solution first. In this case, the horn relay. Though it passed your earlier test; as you said in your last post, “…testing and sometimes shooting from the hip (guessing) and replace parts just to get any reaction and try to get lucky.”
So, I replaced the relay, and normal function was restored.
Thank you, Bartamos, for answering the original post and sticking with me along the way. This could have easily been a more intricate problem. I see a lot of postings that are read but the poster never receives a reply. I was lucky you decided to take the time to share your knowledge — and fortunate the problem wasn’t more sophisticated.
It is members like you that make forums like these, worthwhile.
Stay safe and healthy,
Thanks again,
AD8
