where and how it the AWD/4WD relay labeled,in the power mgt.box

thx,do you think a rear axle is bad? is there a drive gear on rear passenger axle? what engages the rear axles?

It's an automatic engage, from what I understand the transfer case works or it doesn't work. From the research I remember, when it doesn't work it is recommended to be replaced because of the way it's built. It does work off of the right shaft, and if it's not working there must be internal damage to the transfer case or rear differential.