Clearance light / dash gauges seat belt light and buzzer intermittently off and on

[Larry H]

Thanks for letting me join the forum, just bought my first truck it's a 2004 e7427 cx613 vision daycab. Everything worked great when I checked it out driving it home the gauges and seatbelt light flickered off and on a few times figured probably just a bad ground or loose connection haven't had a chance to look at it yet. Also the top clearance lights and the drivers side turn signal marker aren't working right. If I hit the flash button the one on top single drivers side lights up with the lights off. I figured that would be a ground interrupt switch and can't figure out why it's lighting up with the light switch off. I'm kinda suspect to the turn signal switch but figured you guys might have a direction to start in if it's a common issue.  Thanks for any answers and help you  an give me