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[Jimmy Jerms]

Does anyone know how to tell if the power steering contol is working? I had similar on my Senator and was always dubious at to whether it was working. At high speed the car still seems light on the steering.

And how does it work. Should it give a progressive reduction in assistance as the car gets faster or does it switch off at a set speed?

[Kevin Wood]

My understanding is that it reduces assistance progressively as speed increases, so if you can't notice it it's probably working. The system reverts to minimum assistance in the event of a fault, and then it's very heavy at parking speed.

Kevin

[JonArgraig]

I notice at triple figures the steering is much firmer, though at more legal speeds to diffrence is less noticeable

[HerefordElite]

Could you remove the fuse to turn it off and then see if you notice the difference at speed?

obviously you won't have low speed assistance but it is managable :-/

[feeutfo]

  The stearing will be considerably heavier if the relay packs up, as it did on my old car. One day as normal, the next very much stiffer. Not failed, just stiffer, the "relay" if thats what it is, is behind the glove box right up the back.

I saw mark dtm playing with the settings via tech 2 on another car so a diagnostic will tell you if it works or not, there are about 4 different settings, and from what he said, you dont want to change it from minimal assistance iirc.
So in short, dont worry about it, if something was bust you would certainly know about it. Hth