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Performance Upgrades - Maintenance - Modifications - Problem Solving - Off-Road - Street Trucks. Covering the Explorer, ST, Sport, Lincoln Aviator, Sport Trac, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Aerostar. Featuring H.I. - Human Intelligence.
You need to first use the 4x4 Troubleshooting Guide to help determine what's wrong. The hubs come into play ONLY after the T-case has been successfully shifted into 4x4 (4x4 will be illuminated in the dash)
https://www.explorerforum.com/forums/threads/4x4-troubleshooting-guide.202166/
I would poke a hole where the Yellow arrow is pointing to run low current wires into the cabin. I assume you want to run the low voltage Trigger wire (#85) from the Fog relay mounted near the battery.
I agree with @JustinGibson. 3.27 with an automatic and 33s are barely okay on flat ground. They will be terrible going up hills and doing any kind of off-roading. When I got my 33s I had 3.27's for a week or so before I could re-gear to 4.10s. With an automatic transmission I had zero power...
The link to the 4x4 trouble shooting guide on Post #6 has lots of information and pictures of the various components and locations. Is this what you are looking for?