Tachometer and the odometer quit working?

Hello,

It sounds like there it could be a wiring issue with the instrument harness.
First check all the fuses both under the dash and the under the hood.
Several fuses controls the many of the gauges.

https://youtu.be/Hlna_kUt7As

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the fuses checks out, take a look at the wiring harness for the cluster. You could have a short in the circuit or a corroded terminal. You need to verify if you are getting power to the harness.
Trace the wires to find any open or short for the cluster harness. See attached wiring schematics.

Here is some helpful info on how to check wiring:

https://www.2carpros.com/articles/how-to-check-wiring
https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit
https://www.2carpros.com/articles/how-to-check-a-car-fuse

I have attached diagrams for your reference.

Please let me know of any questions.

Thank you.