Dear sredwine,
May this find You Well. I wish your wife a complete and speedy recovery!! Happily, the car seems to have done what it was engineered to do.
You will need:
(a) passenger and driver-side airbags
(b) passenger and driver-side seatbelts
(c) collision sensor
(d) all SRs wiring (identified by bright orange insulation/sleeving.
All of these items - and the steering column clockspring - should be deemed "expended".
The best solution is to find a 1994 or 1995 car at a salvage yard, with an intact SRS System. It will take a few hours to remove these parts. The in-dashboard wiring harness is hard to access: there's a cable tie behind the dashboard center airvents, which I cut, by making a cutter from a hacksaw blade, so that I could hook the tie and cut it. Apart from that, there was no way to get a tool on that tie, without using a Sawzall on the dashboard.
The other items are relatively easy to remove, if the driver's seat motors are in good order. Be sure to check that the vehicle's battery has been removed - or completely disconnected - before doing any work on the airbag system. If there's no battery, You'll need a portable 12-volt source to move the driver's seat, so you can remove it, and so gain access to the SRS collision sensor.
You'll also need a large socket (19mm??) to remove the steering wheel nut. It is lock-tited, so you may need an extra-long breaker bar.
Finally, you should get the Volvo Tech Manual covering the SRS system. The replacement wiring should follow exactly the same routing as the factory-installed wiring.
Hope this helps.
Yours faithfully,
Spook
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