Fusible link replacement now my car has no power?

Did you have no power when before the link was replaced? If so, fusible links go out when something major has shorted like the alternator. I would try to disconnect the wiring to the alternator too if it changes and stops the noise. Here is information on the fusible link Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.

Here is how the power is distributed throughout the car and a guide to help you test for power, but you could have shorted out the IPDM which is common. Here is the unit location and how to replace it in the images below.

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

Check out the images (below). Please let us know what you find. We are interested to see what it is.

Is there a chance the ground cable is not connected to the engine block and car body? Was there a small negative cable that is not connected?