can any one tell me what the wires are for from the petrol tap as mine have snapped at the plug many thanks

Not sure exactly what you mean -  But I would assume if it is coming from the fuel tap it would be the fuel gauge? I would test all obvious things like lights to see if they are working. Try and get hold of a service manual with wiring diagrams.

they are connected to the vaccum fuel tap I don't have a fuel gauge but I do have a petrol light but even when not connected the light goes off (maybe faulty) when ignition is turned on.