200 CHRYSLER CONCORD SPEEDOMETER

I have a 2000 Chrysler Concord with 65,345 miles on it and after a battery
replacement, the speedometer now shows 300,016 miles on it and stays at
this miles as I drive it. My local mechanic changed out the inst cluster,
the engine control and transmission control modules from a wrecked car and
the speedometer stays the same. The car runs good, as it did before the
battery change, just the milage doesn't change. help? What do I need to
replace to make it work again and how can I put it back to the origional
miles?

 

have him check for fault codes in the bcm it also contains the milage and is
more than likely the failed part

 

Where is the body control module located? The mechanic that is working on
it doesn't have a code reader and will have to change out the module. I
still don't know how to get the origional miles back on the car. Thanks
for your help
Bill

 

It is attached to the fuse block (on the back side) at the left end of the
instrument panel.

Bill