I know this is a common problem and I have done what research I can on the Net.
I do have a circuit diagram, but not a full service manual.
I have established that the pump works when connecting 12V directly to it, and have started the engine under these conditions. I therefore conclude the problem is in the circuit feeding it and not the pump itself (it took about 7A which I would have thought is reasonable).
To take the diagnosis any further, I need to get at the "controller" which from the circuit diagram looks like it consists of a couple of relays and a couple of diodes.
Can anyone please tell me where this controller is and how I can identify it.
Also, there is mention of an inertia switch which would cut the fuel off in the event of an accident - I think I may have found that - there is a switch with a red rubber cover mounted on the side bulkhead rear of the battery. It would be useful to have confirmation that this is the inertia switch.
I would be grateful of any help and I am sorry it this has been discussed at great length in the past.
Colin A