it never ceases to amaze me the knowledge and experience on this site.yesterday i stripped out the whole merc/aftermarket alarm system as i was unsure how many circuits were immobilized.turned out to be just one circuit on (youve guessed) it the control box multiplug you describe .i have rejoined the connection although i did not realise it was a can line the wires werent a twisted pair.scoping that connection at the ecu i now have a continuous square wave pattern @5v on term b12 with key on .this must be the signal to make it come alive alas no we still have no start.i now seem to have lost a good signal from the crank sensor so will check that out further tomorrow.i realize that if the crank signal is not there the engine wont start but does it affect ignition fuel pump and injector circuits or just ignition?also still have no comms with modis could this have anything to do with the can line you describe?many thanks again paul