Air Bag problem 95 Avalon

I have changed my dashboard on 1995 toyota avalon and after putting a new one in my AIRBAG light is on. I have checked all the wiers and they are all connected and I am pretty sure it is not a wiering problem. I have been tolled that there is a separate computer for the airbags and I may need to reset it. Any help or suggestions will be appreciated. thank.