Setting the idles and fuel/air ratio

Okay so 2 weeks ago I set my idle and fuel to air ratio and everything is great when the headlights are off.

The service manual states to:
pull the high idle off the lowest step
set the low idle to 550 RPMS.
adjust the fuel air ratio to get the highest rpm
reset to 550 and try again

After that is set and there is no more adjustment:
set the bring the high idle to 750 rpms

The instructions do not indicate turning on any draw items like the alternator or ac compressor. Should I have them both turned on while doing the setting? If so how will that affect the idle when they are off? Will it increase like I expect it to?
Author: admin