hi...
you can start by checking the fuses....the fuse box under the hood, holds the fuse for the gas pump and the relay, to test the relay you can exchange with other one in the box... they are the same ones......in there are some fuses with at engine figure.. check that ones too....
Hope that this help you...
Discovery II 2001
Rebuild > front and rear propshaft, alternator
Replace > oil pump, water pump, time kit, shocks, engine and trans mounts, front wheel hubs, abs front sensor, trans oil temp sensor, evap valve, trans filter, engine sump gasket, clock light bulb...
Cleaning > Throtle body, pvc valve..
Have a nice day...