Tachometer, speedometer and other gauges not working?

This can be one of three things either the fuses are out, the ground is no good, or the cluster itself went bad which is common. Here is a guide to check the fuses and ground which I have included in the images below:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Here is how to change the cluster out, you can get a rebuilt unit by searching Google or eBay. Check out the images (below). Let us know how it goes.

Sounds good, have a nice weekend.