check the 3 wire multiplug to the coil pack. should be 3 wires(obviously) green and red and green and yellow both go to edis module, black one should go to suppressor and then back into the fuse/relay box.
incidentally the wire you have found also needs to go to the rev counter to get that to work, so if the loom you have has been butchered before to fit an aftermarket rev counter for example, that could be whats up.