What make/year vehicle are we working with? Mind the colors at www.mymopar.com Seperate the bulkhead connector that has that circuit & see if the high beam wire is hot when it's supposed to be. That'll tell you to work toward the headlight connectors up front or back inside toward the dimmer switch for the open. Wires go bad at the terminals/connectors on the ends (unless there's frayed insulation from rubbing or heat/broken strands from flexing/burnt strands/insulation from excessive amperage flow which ain't the case here)so check the terminals either forward or inside from the bulkhead (& the open might be in the problematic bulkhead, an easy fix)