Yes, I would pull them one at a time and leave them out as you pull the next ones down the line until you see a change on your meter.
1993 probably has the rudimentary computer that runs stuff like throttle position sensor, etc. There will be a main computer module somewhere.Sorry I'm not very familiar with vehicles built after about 1979.
Check the ignition switch, too. If it's got slop in it it might be staying on ACC or ON even with the key pullout out. My brother drained his battery last week on his '69 GTO with the ignition key on the steering column.
It's sloppy/worn out or whatever and the key came out when the switch was in ACC position instead of OFF.
