Not sure if your Eagle Cap is the same as my Arctic Fox, but I had a similar issue with the clearance lights. Ended up being the connector pigtail that connects the camper wiring to the exterior connector up front, driver side that plugs into the truck, via a short lead to the 7 way plug in the bed. Under the sink in my unit, with some difficulty, I was able to get my hands on the 6 plug connector, pull it apart and fix the offending pin that had pulled back just enough to not make a solid connection. Just get a continuity tester and start at the known point of voltage from the truck and follow it until you find a discrepancy. Fixed mine and it's working so far, so you might check that area.