Cheers Ben..I have read your write up and im going out with multi meter to check a few things tomorrow. The car is now dead!! Started then dies after a few minutes and now wont fire. Noticed that pump wasnt priming so shorted the large pins on relay and pump run for a while now the pump wot turn even with the pins shorted. Fed a wire from a live conection into one of pins on relay but still no pump action. Sometimes I will turn key and pump will run but car wont start then when I try it again the pump is dead.Put it up for sale as spares now cos ive had enough. Let me down when I needed it most xmas day and im sick of it, spent most of xmas afternoon trying to fix it with no joy..