One thing to note is that Limited models have their own specific body wiring harness that is much different than all the other models. All explorers will have the connector for the clutch pedal switch (jumpered on autos), except for the Limited. The limited was not available with a manual trans, so it is not in the harness, it or the wiring. This is one of many differences in the harness. Auto darkening mirror, compass, outside temp, keyless entry, heated mirrors, fog lights, 2 way memory driver seat, to name a few were standard equipment on the Limited and are built into the harness.
An XLT or Eddie could be had with most of these options but they were add on sub-harnesses installed as optioned. I expected to find fog light pigtails on my 94 Eddie as it was optioned with the Electrical package, but to my surprise they weren't there. I cant even find a connector for the switch in the dash even though the EVTM shows it there.
It is interesting to note also that some 91-92 exhaust manifolds have the bung for the EGR connection and its not drilled. I guess they knew the more more strict emissions were on the way.
Steering wheels changed from 91-92, and 93-94. Also 93-94s have color keyed dash vents instead of black, and the dash trim panel around the gauges is slightly different. A/C controls were different in later models and seat upholstery on base models was different from 91-92, and 93-94. Police versions had vinyl rear seats and the early 91 2 door Eddies used the base model striped cloth seat (if optioned) with "Eddie Bauer" stitched in the headrest and the red/blue power adjustment switches, left over from Bronco 2s. Early 91s had black interior door pulls and if you optioned the 'sawtooth' wheel, it had a plastic center cap with fake screw heads in it, instead of the flat aluminum one. Steel wheels were different into 93 and full wheel covers were available on XL 2WDs in 91-92. 92 was the only year that Eddies could be had with tan painted recesses in the "sawtooth" wheels. Clear glass was an option in early explorers and the privacy glass in the early ones was very light compared to newer vehicles.
These are some of the differences I have noticed in my vehicles and others I have seen over the years. If anyone gets the chance, check out the European spec versions. They are very unique. I have a sales brochure for them and its all in German. There are many little differences as well as big styling differences. Somewhere on here there is a thread about them.