Check fusible link AM2 in the fuse box under the hood. If that is blown, you have a short in the ignition system somewhere. Things to check include the igniter, ignition coil, distributor, and fuel injectors. Yes, fuel injectors are fuel system and not ignition. However, a shorted injector will blow fuse AM2, and that will cause no spark. In my 93 ST, I had a noise filter capacitor on the distributor short out, causing the fuse to blow. Unfortunately, it required replacing the whole distributor, which wasn't cheap.