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You don’t mention your model and year, also whether you’re planning to replace the air bag. I would be disappointed if you’re planning to defeat the SRS system, plus it’s not legal.
The general SRS safety protocol is to disconnect and safely bag the battery negative lead, wait for the SRS control module capacitors to discharge (10 mins is generally considered quite adequate), avoid static discharge (unlikely deployment, but theoretically possible), avoid having your head in the firing line of an air bag any more than needed (especially when disconnecting/connecting wiring), be extra careful with SRS wiring (do not use a meter), and above all avoid striking/damaging the SRS control module (containing the sensors). Know how to use the OBD system to check/reset the SRS control module (see the FAQ). When in doubt or if you don’t know what you’re doing then refer the job to a qualified technician.
For the steering wheel, keep the front wheels pointing straight forward with the steering wheel centred. Note the precise orientation of the steering wheel on the spline for re-installation (use a scribe to mark the end of the spline). Know to lock the clock spring (aka clockspring) prior to removal (and if needed how to check/reset the clock spring to the neutral position). Have the appropriate socket (deep 27mm for most later RWD, 1-1/16” 6pt should also work, some regular depth sockets will also work), a short extension and preferably a breaker bar and torque wrench (I don’t have the spec handy). If needed, to restrain the steering wheel to loosen/tighten the nut, you can use a rope through the steering wheel and tie it to the top of the door. For 740/940, consider loading extra grease down deep on the upper column bearing (they can dry out, leading to grumbling when parking, use a grease gun with a needle).
For more information, look in the FAQ here and search old posts here and elsewhere (Google is often better at finding things in the FAQ and such old posts than the site search feature here, even though it is Google driven)
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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