Snowy morning; depressed 4wd button like I have many times before in snow - indicator lights just blink - never gets totally engaged, and can't get it out either - seems like a solenoid or linkage issue? I have checked 4wd fuse, driven car forwards, backwards, nothing seems to shift system in or out of 4wd - have depressed and released the 4wd button many times - system indicator lights still blinking....Linkage or electrical reset?