I have a 94 940 non-Turbo with what I believe is an airbag problem:

90% of the time when I start the car the SRS light will stay on, and the car will run off the battery until it dies if I don't alleviate the problem. I found out that by hitting the front of the passenger side airbag, the light goes off, and the alternator kicks in. I don't remember how I found out about this fix but it works. Most of the time a gentle tap will do, but sometimes I really need to hit it hard a few times until the light goes off. Interestingly, the temperature gauge stopped working one of the times when I had to hit the airbag a little harder than usual. Not sure why as they are on opposites sides of the dashboard. I have removed the glove compartment to check for loose wiring etc, but all appears to be tight and ok.

Any help would be much appreciated.