as the title says

bulb isn't blown and I've tried another bulb still doesn't work.
It's wired up just like the instructions said to so any suggestions?

Is everything tickety at the sender end??? Bests, bog.

Yep all works reads 4 bar at idle (photo taken while engine running), brand new sender unit gauge has never been fitted before just sat in the box since '83

Sorted

Took the bulb out of it's holder and the filiment at the base had somehow snapped off so no connection, so I've fitted a green bulb to tie in with the rest of the gauges.