I notice you are in PA. WIth all the snow we had the other day, it's very [ossible that the switch is jammed with snow/ice.
During the big v-day storm we had in Feb, i was driving through some really deep snow and the 4wd mode lights on the dash didn't work even though the 4wd itself did.
As soon as we got a thaw a few days later they started working again. If you were in a situation where the snow could have packed around the T-case, I'd wait a few days before you take it in.
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