Turbo_Terpstan

I'm working on Evo that needed the pass airbag replaced as it was the dash pad from an Evo that was wrecked. Installed new airbag and the srs light goes off then comes back on. I tried the module from this car in my car and no srs light. The front sensor seem to be good and the check must pass for a moment as the light goes off. My srs scanner won't connect to either Evo so I can't pull fault codes. Any ideas? I have read every srs light problem thread I can find. Both are Evo 8