I've been having this problem for quite awhile and I really need a fix. I have a BEL 955 and I've got it hardwired. I've been having a problem with the VOLUME ramp-up going on and off once in awhile while hardwired as if I'm pressing and holding the volume button when I'm not. Also the VOLUME BUTTON is unusable while it's hardwired. It does nothing if you press on it.
When I use the cigarette lighter cord, it works like a charm and never ramps-up on me out of nowhere.
I understand that this is triggered by one of the wires since my cigarette lighter cord has a mute button which you can press and hold to adjust the volume.
I've also sent my radar detector for service since recently my LASER band kept going on and off out of nowhere. They sent it back saying they've replaced the LASER circuitry and everything else works perfectly.
Any ideas, maybe I can clip one of the colored wires so this doesn't trigger that problem. Thanks for all your help