Hi,can anyone advise please.I have used low range with diff lock to tow a car out of the snow,slowly for a couple of hundred hards.I then transfered back to high range but the diff lock light has stayed on.I have tried moving the lever back & forth quite a few times.Could it be the switch stuck on or could the diff lock be stuck on in high range.I have seen on another tread to reverse for a few metres,which i will try just thought you guys might have some other answers.Many thanks