Yeah checked earths and looking at wiring diagram inboard and outboard highs share same earths through high beam relay yet outboard highs work and checked inboards with multi meter with highs on and no earth at housing, maybe time to take to auto electrician.
VX II Calais inboard high beams won't come on, globes, relays and fuses all good and has constant power to globes, outboard highs work so what could be the prob?