4wd electronics 03 limited

[MARINE_HMLA]

Still no 4wd im goinh to just start check voltages and see if anything is dead. My question is how many volts should the 4wd system being using in the ecm and the actuators

 

[Chandler_Ross]

Correct me if I'm wrong. But doesn't the 2003 Limited have full-time 4wd (AWD)? Are you having problems with the center diff, or low range?

 

[Stuck CAPS]

Still no 4wd im goinh to just start check voltages and see if anything is dead. My question is how many volts should the 4wd system being using in the ecm and the actuators

So you bench tested the actuator and it works. If NOTHING happens, it's probably the 4WD ECM. Have someone knock on the T-case while you try to shift it into 4WD, see if that does anything (engaging-wise).
You can probably find your answer in one of the manuals, I don't know though.

Correct me if I'm wrong. But doesn't the 2003 Limited have full-time 4wd (AWD)? Are you having problems with the center diff, or low range?

That's the 2010+. The full-time 4WD 4th gens are all trim packages w/ the v8.