Seems like it could be a ground wire that is loose. Some times the ground on the tongue is loose even tho there is a star washer holding it in place. I would re move this bolt wire brush the area and reinstall and see what happens
Frank and Janet Henn
2008 CF32Bl pushing a 2007 Dodge
CDT with a six speed Automatic
Traveling with Hoover and Rainbow the wonder dogs and now with Sunshine the rescue Schnauzer.