My wife's 4 wheel drive stopped working on her 92 explorer. The auto hubs are not engaged but both the 4x4 dash light and the switch light remain on continuously. The low-range also does not activate when attempting to push the button in neutral, nor does that indicator light turn on. I've already performed the test on the module in the access compartment above the rear wheel well and the "4 blinks, then off" action tells me it's not the problem. I've searched around the web and have not yet found anyone else describing this particular experience. Wondering if any of you fellow-explorer enthusiasts out there can relate to any of this or recognize these symptoms? Any help of where to start would be greatly appreciated. Thanks and happy exploring!