more immobiser fun and games!!!

Hi all.ive got same prob.ive got a 98 300tdi auto.went too start it key light on...led light.looked every where for spyder.not there.found green box.had that checked.all ok.found earth wire to it was broken.new earth.all light go out.central locking working.turning over.not firing.f.ck.new lift pump and cut off solanoid.what else can it be.