Headset lights not working

[shropshireiron]

Hi all, recently taken delivery of my Vespa PX200 Disc and although the speedometer works ok the other functions on the headset do not.
The indicators & lights work ok but do not register on the headset unit. Also the Fuel gauge doesnt work.
Ive seen a replacement LML speedo which looks exactly the same (even has Vespa logo) as mine on ebay for about £25.
Ive checked the circuits out for physical damage etc but no joy. Does anyone have any clues as to what the problem is and also are the LML speedo's (described above) compatible with my scooter?

[sbwnik]

The LML speedo isn't a straight swap, but with work you can get it to work, but you need to know what does what inside the handlebars.

I'd check the earth wire (black) inside the handlebars. If no joy, pop the plastic connector off the back, and clean up both sides of the connectors as best you can. and squirt WD40 into the block.