each injector is run by a seperate wire coming from the ecu, they have a common ground, if you aren't getting any pulses from any of the injectors then I would check fuses 3 and 18 in your under dash fusebox, they should both be 7.5A fuses
Also check your underhood fuse box fuse number 31, this should be a 15A fuse.
If your fuses are all good, check your engine grounds, 1 on transmission and one on cylinder head to make sure they are both there and that they are hooked up.