900S cabriolet fuel problem...

[Kerbouzard]

... there ain't none!!
Moved the SAAB a few weeks ago parked up (literally on a slope with next to no fuel in the tank) attempted to start it yesterday and nowt. It coughed a bit and that was it. Managed to flatten battery trying to start it. Charged battery put in 10 litres of fuel and... still nowt it coughs once at the off set but bugger all after that.
Took plugs out check spark, OK but plugs seem dry ie no fuel.So me in techy mode reckons there is either krapp in the line thru dragging the dregs when there was no fuel in tank or a pump ain't working.
So the question how does one check the fuel system out on an injected system?
I haven't a manual so I don't know the layout of the fuel system can anyone point me in the direction of a schematic for a 1993 900S fuel layout.
Can't bump the beast as its an automatic.