TGP No crank, No start, No ALDL data

[rich_e777]

Well I think this car is having a similar issue to a `91 Firebird right next to it as if the TGP got infected. No crank, can flash code 12 by jumping A and B on the OBD port, no reason to suspect orange data wire damaged itself inside the dash and the flow chart in the FSM concludes to a faulty ECM or PROM. 

Is there something else I can test or check to rule out a faulty ECM or PROM? I went the replacement route with the Firebird, spent the money on a new ECM and PROM and it still didnt work. 

[rich_e777]

Nevermind. I have a bad OBD connection and just couldnt see it without getting upside down in the drivers seat, I was able to connect my scan tool. I think my ignition switch has gone bad or the aftermarket anti-theft is causing my issue. I dont have a VATS pellet in the key so that shouldnt be an issue right?

[White93z34]

No factory anti-theft of any kind in these. My guess is if you have an aftermarket alarm/anti theft that is where I would start