00WhiteEKy

(99 gsr in 92 vx hatch. obd-1 ecu. P72) ok, in extensive tests, i found out that my IAB is not working becasue my ecu is not putting out a ground at A17. I was told to turn the key on, but i don't have to start the car. and there should be a ground at A17. But with my trusty light i had, no lihgt. map ground and TPS ground work, but no ground at A17. so that has to be my problem. i have tried everything else with the IAB. so what could be wrong? is my ecu whacked? My secondaries never worked since i swapped the motor. Do you guys think my ecu is bad? I was wondering why that would go bad, and if that went bad, what else could be wrong?
I did just spend some good money on a nice mugen chip. so it would be a waste to have to buy a new obd-1 gsr ecu. but i know someone running a skunk 2 mani. could use this. but please inform me what you all think.