1.have u unplugged the airbag computer box behind the aircond blower??
2.which L9 is this?? ef-det?? jb-det??
3.all wiring in engine/speedometer/ECU connected??
4.if auto, ensure gear position at P cos the cable might be loose (it might sound funny, but i've seen this happen when trying to start an L9 halfcut)...
5.check for faulty fuse(if any) inside car and inside engine bay, specially the ECU and EFI fuse...