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

[rich_e777]

There is an aftermarket one, when it does happen I can wiggle some of the wiring to it and the car fires right up. Ive had to unplug the horn and battery ground to keep from pissing off the neighbors as it will go off for no reason at all and rearms itself after 20 seconds. I went to the manufacturer to get some info on it but it wont disable after going through the process outlined.

Its a rats nest of wires, relays and fuse holders all taped together with other wires just clipped and hanging. I`m slowly starting to ID and label what I can without taking out the drivers seat.