Electrical issues

Hey everyone! I have been dealing with what im guessing is an electrical issue (not my strongest system knowledge) for a few days now. My whole left handlebar switch assembly wasn't working along with the headlights as well. Come to find out it was just an unplugged wire connector. Unfortunately that didn't fix everything 100%. My headlights are still not working no matter if my hi/ low beam is switched either way and my horn seems to be loosing power/ sounds more strained as I turn the handlebars to the right. Any recommendations on how to pin point the issues and fix would be greatly appreciated. Images and/or videos would help a lot as well. Thanks in advance.