Say all! I'm trying to help a friend with his cherokee. I know, I know, this isn't a cherokee page but, this site is o' so much more informative. My friends cherokee is not engaging in 4WD. The light is coming on but, no front axle engagement /wwwthreads_images/icons/frown.gif. I was wandering what we could check, vacuum leaks?, trolls?, secret Klintonian strategy to make 4WD ineffective? /wwwthreads_images/icons/laugh.gif I'm leaning to this last one, HA! Anyway, just wandering what I should check first as it's really cold outside here in TN and I don't really like to work on vehicles when I can't even grasp a wrench. Thanks for the help.