Also check for codes as all the ignition codes don't light the ses, and disable the fuel injectors from opening, as well as, no spark.
Then grab your wiring diagrams, pcm symptoms chart, trouble shooting charts and get going. If you don't have these check thread in this section titled "GM service manuals" and download the 94 manual. Volume 2 will have the info you need. 94 manual has almost all info the same as your 95. For the small differences, www.shbox.com
will provide the info.
You will start by confirming that all fuses and fuseable links are in order. Then all power leads to components are in order. Grounds are next. to engine and pcm grounds and power sources are vital.
Next step is to make sure electrical part of ignition switch is sending power on all power leads. Make sure connectors and their pins are good. Not only on ignition switch, but opti harness, sensors, pcm, etc.
Next note, if car is automatic is to check the main transmission wire harness. This is because the trans gets it's power from the same source as coil & icm. If there's a problem with the trans electrics, or its wiring, it can pull down power to the coil & icm.
Watch the diagnosing the opti video, found in lt1 engine section sticky threads, and run tests.
Download Gary Dougs obd1 scan program, located in 4th gen section and get yourself a cable to connect car's dlc to usb of laptop or note book. Get cable at the following source; ALDL OBD1 OBD cable OBDI OBD2 engine codes
$59 plus shipping. I suggest Gary Doug obd1 scan because from what I understand of the program, it can tell you if low & high resolution signals in opti are being produced. I would pm GaryDoug to make sure before spending money on the cable. However, even if program doesn't detect opti pulses, it's still a good scan and code program. You can also download the trial version of DataMaster at the GM manual link in 4th gen section. And freescan is also available from me.