Re: 4x4 cable
the indicator light is activated by a swithch on your front diff, you can see it right where the cable goes into the front diff, if it is allways on then your front diff is allways engaged(not good) when it is up in the air, put it in 4x mode and if the front wheeles don;t turn, then try to stop your front driveshaft fron turning, if you can, your transfercase is shot, if you can;t then your front end is broken, thats what happened to mine, theres a little slider gear in there that contolles the front diff(slides passenger side to engage, driver to disengage) the thing is there is a really cheep flimsey retainer that helps slide the gear out of 4x, if that breaks your in trouble, then it is allways in 4x (front end engages) or allways out (front end not engages) or half way between, (front end half engaged makes funny grinding noise when not in 4x front wheeles not turning) thats what happened to me, i just need to get up in there and fix it.
if you do open up your front end, if you could take some pics and do a write up, it would be greatley appreciated, or if you live close enough i could come help you... I live in north west indiana.
Hope I helped
Like A Rock