thanks for your reply. had another poke around and found a 10A fuse on one the relays but that is sound, with a voltage in and out. Adjoining the relay I believe to be for fuel pump feed has fuse rated at 30A it reads Ok and I can measure 12v on one end. But with limited access with my probe I cannot get any reading on the other end trying from underneath . I will have a further attempt tomorrow with a better probe to see if its my problem of a poor connection and check for continuity to pin 30 of the relay . One lives in hope.
Thank you very much for your detailed help with this problem much appreciated.