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I got a 2003 f250 7.3 4x4 and my switch won't lock my hubs in...the 4x4 light is on on the dash but doesn't lock them in..I don't hear anything when I turn the switch ..thanks
If I remember right the light doesn't come on until the T-case is locked in. It's extremely common to have problems with the automatic locking hubs. Try manually locking your front hubs and see if that works. If so you have a problem with either the hubs or the vacuum system that controls them.