where are the earthing points?

Hi, yes it worked fine before, but going on what you mentioned that drivers side panel fell off a week before this happened......sounds like it could be connected

Hi Yesterday i connected my trailer and tested the lights before setting off only to find the left indicator on the vehicle comes on correct but the right indicator comes on the trailer..... and the otherside is the same. Some have said it could be an earthing issue but any help where these...