So I put my Rubicon in 4-W drive & locked both diff's the other night. To make a long story short my front diff won't unlock. So I went thru all the usual routine to no avail. I decided to unplug the harness at the diff. to see if would unlock, tried to start it & nothing. Dead. Jumped it off still locked? This is an '07 with 49k miles, I have put it in 4-w/locked about 4 times sine I've had it. Ideas?