Those connector things do look like you may have a problem. In the bottom pic, that yellow wire connector doesn’t look like the blade is seated all the way down. Personally I use posi-lock and posi-taps, but they’re admittedly really expensive. But I’ve used those ‘scothlock’ connectors on other projects too with little issue. My recommendation is to start with all of those and confirm the blade is seated all the way. I’ve had to use pliers to secure them all the way down. Also, it’s been awhile since I’ve done my radio install, but I believe on the main connector, the red and/or yellow wire is the power wire. Obviously, black is ground. So I’d start by trouble shooting those. I remember I had illumination problems and reception problems and that was orange and blue wires respectively. So check all your red/yellow/black wire connections first.