ECM troubleshooting

I have a 1993 Pontiac grand am with quad 4 and 5 speed manual trans. The problem is engine will not start and run. Problem started like this. While pulling the park brake release handle an electrical arc was heard and the engine died. After trouble shooting I found the ECM/F INJ fuse blown. I replaced the fuse to no avail. I found that there was a wiring harness that runs under the dash that was sitting on top the park brake release cable and was rubbing every time it was pulled. Eventually rubbing through the insulation and arcing to ground. So my question is could this have damaged the ecm? I have no check engine light ever now. Even when I try to jump the DLC to check the codes. I hooked a scanner up to check and it could not establish communications with the ecm. Which pins give signals to power up the ecm? I have checked to see if I have the 5v reference voltage to the TPS, MAP sensor, and there is nothing coming out of the ECM. I'm lost and I don't want to just go out and spend all that money on a new ecm if it is only the ecm isn't receiving it's signal. Thanks Ed