Simon,
Grab yourself a beer, and sit back and scratch your head.
If the KEY is in the ON position, and you jump the starter to crank the engine,
does the engine start or just crank?
Have you checked all of the cables from the battery to their connectors, make sure they are plugged together tightly ?
Make sure all the grounds from the battery are connected ?
Do you get a Check Engine light when you turn the key to the ON position ?
Pete...
98.5 SE Sport Duratec ATX (P66L) Black Clearcoat on Greystone
DOB 11/21/1997
DOP 12/25/1997
PIAA 510 Super White Driving Lights
SVT CAT-BACK EXHAUST (No Resonator)
DiabloSport Chip (LPQ4) - Engineered To Raise Hell
Too many other mods to list...
Sounds sweet, runs quick...
Crazy Horse Dyno @ 121.4 WHP/129.6 TQ