11 Pete 386 cab light problems

For the last 2 weeks I've been having multiple lighting issues. With a trailer connected the breaker behind the clutch keeps poping 30-40 mins after connecting a trailer killing dash lights and all exterior but headlights. Oh, and thank you button buzzes behind instruments. I unplugged trailer at each end of pigtail and nothing changed. After parking for a break it still has problems thinking the breaker nedded to cool off, nope same problems. So I dropped trailer to come home and after disconnecting and turning ignition off all lights but cab and blinkers on steps work. Still no thank you button and no more buzzing so I guess no power there at all. I've pulled all relays behind instruments above column and moved them around to see if one is faulty, all are good. Ive also pulled all breakers behind clutch to see if the work in other locations, all are good. I've also unplugged pigtail at cab side and no change. Please give me some insight.