You can't get engine codes from 98-00 model years. By pressing the odometer button you put the cluster into the actuator test.
Cluster not coming on could be caused by a blown fuse as well as a problem with the cluster connectors. I can't tell you which fuses to check as i'm on my mobile. Check the wiring diagrams in the FSMs linked in my sig.
Edit: Back home now. Your cluster gets constant power from fuse 25 in the underhood PDC, and switched power from fuse 10 behind the glove box. Check them first as it's the simplest and cheapest thing to do.