fuel gauge reading zero just filled up £10

[Bellend]

A LOT of cars won't even move with a tenner. Two Clios I ran about in didn't, all my MK3's didn't unless I reset it (the trick where you get the digital rev counter) then turned it off and back on again.

The only two I know that do move is the A8, Passat and a Range Rover.

[Shizzle]

Odd thing just happened I fitted HID's the other week no problems then problem started few days ago but when I turn them on rev counter spazes out and fuel gauge starts working I think there is some dodgy wiring somwhere but gauges and sender work fine. It seems when I turn my lights on it triggers the the petrol gauge and it works fine after then.