linhardt
Senior Refuge Member
I am going to open a shop for fixing trailer lights and simply name it " it's always the ground wire" ... People from far and wide will understand....

What someone needs to do is sell a complete harness with it all grounded through the vehicle with heavier gauge wires, heat shrunk connections, etc. I would pay extra for something that is almost guaranteed to last a lifetime. That person who creates this will make a lot of $$.