On the floor near the shifter is a picture of the drive train. When you put the lever in 4HI or 4LO the front drive shaft should illuminate. when the actuator actuates the front axle should illuminate. If it doesn't, it didn't work.
The Constitution needs to be re-read, not re-written!
If you can't handle Dr. Seuss, how will you handle real life?
Current oil burners: MB GLK250 BlueTEC, John Deere X758
New ride: MB GLS450 - most stately
Gone but not forgotten: '87 F350 7.3, '93 C2500 6.5, '95 K2500 6.5, '06 K2500HD 6.6, '90 MB 350SDL, Kubota 7510