I recently changed my instrument cluster out with one purchased from a salvage yard because the odometer section of my instrument cluster had sections of the numbers that didn't light up properly. My car has 241,000 miles on it. Although I like the 45,000 odometer reading that is on the instrument cluster I changed over to , I was wondering??? How do I get this cluster to read the correct mileage that is on my vehicle?

I'll be interested to know if that is possible too.

As a funny aside, 2000-ish vintage Volvos had their mileage (and other stats) stored in memory that was resident in the rear view mirror if you can believe it.

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Wolfman,
there is a part (JLM1932) which is within the instrument pack, and which is the numerical display. Whilst I would stress that I am not 100% certain, I do not believe that this where the actual mileage is stored, so if you were to fit a working JLM1932 (perhaps from your replacement instrument pack?) to your original instrument pack, I think your correct mileage would be displayed.
It would seem that it is still possible to buy the part too.

As soon as it warms up, I'll let you guys know if this worked.

The millage is stored in the large circuit board under the back panel of the instrument binacle unit, the small display is just that - a small display