There is a fuel pump fuse, did you check that?
Remove the fuel pump relay. Check the voltage at relay socket position 30 (look to the relay and it will show the pin position). There should be 12V (battery voltage at all times). If there isn't 12V, there is an open circuit from the battery.
If there is 12V then place a jumper wire between the 30 and 87 position of the relay socket. You should hear the fuel pump running. If you do not hear the fuel pump it may have failed or the wires to the pump may be cut.
If the fuel pump runs, see if the engine will start. If the engine starts the LH fuel injection module has probably failed. I can fix that problem. You can contact me at electronikrepair@earthlink.net
Rich
Membership Chairman
Charter Member
1993 928 GTS Cover Girl
1987 928 S4
1979 928 5-speed rescue
1979 928 5-liter track beast