I don't have a picture, unfortunately. On my '89, the idle set screw is covered by a rubber plug on the top of the throttle body near where the vacuum lines plug in. The FSM has an illustration, and if you don't have a copy, I believe you can find a zipped version on MontyMcV's http://www.afabot.com/ site.

Besides checking the coil resistances, see how much play there is in the pintle when you try to (gently, between thumb and forefinger) rotate it by hand. My old IAC was very loose, and the new one had no play in it. My understanding is this wear can also effect how well the ECU can adjust the IAC steps. The coils on mine were all in spec, yet the ECU could not adjust it to bump the idle up when the A/C compressor kicked in. A new IAC cured that.

Eric W.