p38 diesel 2001 major probs please help

hi my RR auto started to rev up and take of like a bullet in drive then cuts outs reading gearbox fault,starts straight up and does the same again,changed the battery,no different,changed fuel filter,no different,then had mad idea to pull connections of fuse box and refit them only to blow maxi 2 fuse 60A,changed that now key wont start car,fuse 12,13,14,15 fault on dash but all fuses are ok,love the car just want it back all ok,
please any knowledge to help would be very much appriciated.
Mike.

try the range rover section

Could be faulty fuse box as spurious phantom fuse failure messages are a classic example of burnt/corroded fuse box connections.