Dashboard four wheel drive switch

I have a test light but am not familiar with a scan, I used to be a heavy truck and equipment mechanic before everything became computerized. I havent got a book yet, I am told the control module is under the drivers seat? Would the relays be located there also? As I said there doesnt seem to be any power in the cable from the module to the motor. The buttons and lights to engage the system worked fine until I unbolted the transfer case motor, coincedence? Thought I may have blown something having wife turn ignition on and engage with motor unbolted. ( Grounded)

Bearing in mind that the lights worked until I un bolted the original motor, then I had no lights. I unplugged the 5 and 8 pin connectors, turned the key to run position, no lights at all, I checked the #7 and 20 amp electric shift fuses with multimeter again, both good.

Well I guess I should uplug the in put cable to control module and see if I have power to the control module since the fuses are good?

I removed the input cable for the control module and have power there, there is a red light at bottom of module with a white tab (button) if u push the button the red light flashes off and on, depress button again it stops.

I called the salvage yard $65.00 for a used one, goin to pick it up, thx for all your help, will let u know how it turns out.

I went to the salvage yard and purchased a used module and installed it, The light on the button comes on very dim if u hold the button in and I hear a faint clicking noise back by the module while pressing button. Still no four wheel drive.

Electrical problem
2001 Ford Explorer 6 cyl Four Wheel Drive Automatic 125000 miles

What is the most likely cause of the 4wd not engaging. Was working 2 days ago and now suddenly when I turn the switch no engagement, no lights, nothing. My truck is the Sport model with electronic 4wd switching.

Transmission problem
2002 Ford Explorer 6 cyl Four Wheel Drive Automatic 102000 miles

Had new frt. Shocks upper & lower ball joints tie rods and the CV axel replaced on drivers side and the same on passenger eccept cv axil, but had to replace wheel bearing on passenger side. It snowed and now the 4x4 switch don't engage the 4x4 no lights on dash for4x4 either, what could be wrong?

Hi everyone I have or had a similar experience with my 4 wheel drive I got a 2002 XLT 4.0 with 180,000 miles for 600.00 steal right but it ran didn't knock, smoke, over heat so I threw cash and ran lol, u went to a little field to try 4x4 well wa WA WA I also noticed service engine soon light. Yesterday was actually on my way to AutoZone when I had I'm better than them moment, stopped at a Walmart parking lot pulled the glove box tapped on the 4x4 control module then made sure wiring harness was snugg. Turned truck off and back on herd the module clicking service engine light is now off and all push button control working for the 4x4 only issue I have is no indication from low or high but I'm sorta old school anyway I always stop or at least put in neutral before engaging 4x4. Hopefully this helps someone out there who doesn't have 400$ to replace that module

I cannot get the SUV to shift to just two wheel drive even after overhauling the selector motor on the transfer case.

Yes there is power to the motor because I can select 4whl LOW. It shifts between 4 whl LOW and HIGH with no problem.
I thought that the neutral position on the selector shaft on the Transfercase would allow 2 wheel drive but it wont go forward or reverse in that neutral position.