Help... My four wheel drive High or Low will not engage on my 1995 Ford Explorer Eddie Bauer edition. This is engaged "on the fly". The light comes on indicating they are engaged but they it is not.

Question edited for clarity.
Question moved to model category.

It will be low transmission fluid, blocked filter or problems with the solenoids. Best way to fix is to call a mobile auto electrician with a pro grade scan tool to diagnose the issues. Their tool is bi-directional and can command solenoids to operate and verify that they have.

Question edited for clarity, full year make model
Question moved to sub category.

It appears to have history. A bit worrying you say 'kinda changed the filter and fluid'. Most are sealed for life, and the amount of fluid is critical. If you drain, you measure what comes out and replace with the same amount of the right type of ATF.

You are not alone with issues

https://www.google.com/search?q=1994+Explorer+Eddie+Bauer+4x4+wont+go+into+Drive

Schematics

https://www.google.com/search?q=1994+ford+explorer+eddie+bauer+4x4+transmission+schematics

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Ford Explorer (1996-2001) fuses and relays

https://fuse-box.info > ford > ford-explorer-1996-2001...
Fuse box diagram (location and assignment of electrical fuses and relays) for Ford Explorer (1996, 1997, 1998, 1999, 2000, 2001).

1997 Ford Explorer fuse box diagram - StartMyCar

https://www.startmycar.com > Explorer > Fuse box
The 1997 Ford Explorer has 2 different fuse boxes: ... Ford Explorer fuse box diagrams change across years, pick the right year of your vehicle: 1996, 1997 ...

1995-2003 Ford Explorer Fuse Box Diagram

https://knigaproavto.ru > shemy > 314-explorer-fuse
Jul 29, 2017 - Fuse Box Diagram Ford Explorer and Ford Explorer Sport - 4.0L ... Small Block (XL, XLT, XLS, Eddie Bauer & Limited; 1995, 1996, 1997, 1998, ...

Ford Explorer (1995 - 2001) - fuse box diagram (USA ...

https://www.autogenius.info > ford-explorer-1995-200...
Aug 7, 2015 - Ford Explorer (1995 - 2001) - fuse box diagram (USA version). Year of production: 1995, 1996, 1997, 1998, 1999, 2000, 2001

replace the electric motor on the transfer case

Normally 4 wheel drive HIGH is engaged on the fly or as you are moving more than 10 km per hour or 10 miles per hour but 4 wheel drive LOW is engaged at around 3 to 5 mph. no more or you could ruin the transfer case. Try going from 2 high to 4 high by switching back and forth and then try 2 high to 4 low when idling along. What usually happens is the mechanics under the car freeze up or rust up and you have to switch back and forth to free it up.

I would say it is very low on fluid.

check the electric solenoid on the fly which diverts the vacuum to the front wheel to engage the drive shaft.Usually two solenoids located on the radiator panel.Check for broken vacuum hoses or leak

should have some kind of fault light on to read fault codes

its mostly an electronic solenoid shift system
could be a transfer box fault

I have a 1994 ford f150, my 4 wheel drive keeps trying to engage by itself even without me touching the automatic hub button....at time you can even hear it engaging and disengaging by itself, the low range light even comes on (dimly)...what could be the cause? the transfer case motor looks good and so does the wiring.

wheel bearing