Power Steering Pressure Switch

[alm450]

Does anyone know where they are?
If I sit at a light and turn wheel even a little it drops the idle so low it causes the oil pressure light to come on.
Maybe it's the pump but I don't hear any loud noises from the pump or anything, and I think it feels OK.
Or is it time for pump replacement?

 

[TeamFord]

This is the best thing I could come up with. I checked all the regular #'s for the pressure swtich but nothing. So I think this may be it, see the highlighted part #.

 

[NYC LS8]

How old is your IAC valve?

 

[alm450]

Not sure
Probably as old as the car
I took it apart last summer and cleaned it.
I guess it's time to do the test when the car is warm, by unplugging it.
It idles pretty good though, a little high, but haven't noticed any surging really