Digital Odometer staying on with key off and out of car? Is there a relay for it

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I just noticed this the other day. Had to jump car and noticed that the odometer stayed on even with the key off and out of car. Is there a relay of some type that tells the instrument panel(odometer) that the ignition is turned off. My battery is only 8 months old and test good.Could it be a bad cluster or some type of fuse or relay or could it be the ignition switch? HELP All the other lights turn off and is working properly.