>
> Lets hope you only have an earthing problem. You might also
> check the fuses and fuse box.

If I could add my 2p worth...............

I had a similar problem with an Uno 45 where the headlight main beam would
work fine one minute and fail totally the next.

Replacing fuses etc had no effect.

I eventually traced the fault to the fuse board itself - I discovered that
waggling the connector blocks to the board miraculously made them work
again.

Tracked one down at a scrapyard, swapped it and it's been fine ever since.
(touch wood etc. etc.)

I took the old board to pieces and examined it but there was nothing to see
visually.  Possibly a fractured printed circuit track?

HTH

Paul