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Not 100% positive but I think that the SARC and power steering work hand in hand. So when the fuse is taken out the power steering assist is limited. Not sure how accurate my info is but I'm sure that someone will give you more help on the matter.
The SARC controls both the struts and the VAPS. If you want to **** just the struts then either unplug the struts, cut and switch the sensor ground wire or remove the ride height sensors. This will leave the VAPS as it normally is.