Yes it is the rght trailer blinking fuse.  Micro 15 amp.  Under hood in fuse box.  Already diagnosed.  Yes it was in there for a multi thousand repair under recall.  YES they quoted $150.   Yes I often do things for my customers for "free".  Children hands in concrete for example.  Should I charge the 3yo kid for that effort ya think?  Yes many things pop up and no I dont micro charge every detail but instead try to make customer happy and to feel good they hired a respectful considerate person.