The diff lock light in my Disco I is not turning on when diff lock is engaged.
What could be the problem
Thanks
Jay

is it actually engaging?
jack one wheel it should turn(handbrake off level surface)
engage diff lock it shouldn't turn now.
if it does check linkages
if it doesn't check bulb/wiring connections
on transfer box.

Or burn the truck for insurance money -- if that light doesn't come on your truck is about to explode.

:flipoff2: