digital dash losing memory

The digital dash is losing memory. It shouldn't lose the odometer, but it does. Is there something wrong with the dash or a short?

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What year is it?
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The cluster has a battery that has died and it needs to be replaced. I cannot remember. But, you take the cluster out and take it a part and remove the battery and replace. You will need to go to Radio Shack or the like and solder the new one in. Jake wrote:

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