So, a short update on the 748....
I have been away on the West Coast of Saudi for a bit of a work's road trip so it gave me time away from the bike to work through why the blooming fuel pump wasn't priming. As you guys know, I have worked through everything but with no success. So, Saturday I decided to finger walk the loom from start to end on every plug, earth and relay to see if I could find the issue.
In doing so, I couldn't figure out why the rear brake (two pin plug) was really tight from the loom where it sits under the rear subframe before heading behind the airbox fairing on the left hand side. I never remembered it being like this so I was trying to get some extra millimetres on the loom by re-arranging relay wires, earth positioning etc. and to my surprise behind the fuse panel, there was another 2 pin plug which I had missed. Being slightly perplexed about this (and that the rear brake wasn't lighting up when pressed) I swapped them over and the light starts working. Happy Days, but still no fuel pump
This additional two pin plug I was left with was not in the Haynes manual and not in the ducati factory manual. So a quick search online for "two pin plug brown white wires ducati 748" revealed that it was a plug put in by Ducati for a 3rd party immobiliser. I bridged it with a bit of electrical wire as described on another forum and hey presto, the fuel pump primed!!!!!!
After re-assembling the tank with the fuel pump, priming it a few times, I pressed the start button and it was music to my ears with the new 50mm termi's bellowing out
Thank you all for you help and experience in trying to figure the issue out and hopefully see you somewhere for a brew and a wedge of cake.
Keith
P.S. As we all know the pain of the O-Ring on the fuel pump assembly getting nicked when putting it back together, I watched a youtube video where the guy put some longer M6 bolts into to main tank bolt holes and had a nut/washer on the bolt which he tightened up one turn at a time. Once fully seated, you just undo the bolt and replace with the actual fuel tank bolts. Super simple and super fast compared to the last one I replaced on my ST4S which pi**ed fuel everywhere a few times before I got it right.