I have A 2000 Dodge Ram1500 4x4 Extended cab. I don't really know what happened to it butall of my gauges went haywire on me. I checked all the fuses but they are OK? Any Idea what else it could Be?

When you turn your ignition ON, take a DMM and check the voltage readings at a number of sensors. This should help you determine if your ECU (computer) is responsible.

I would begin by calling several Dodge service managers and see if they can shed light on the situation. After that, I would study a wiring diagram, which might give you an idea of likely culprits. Next, I would start checking out the electrical harness going to the instrument cluster. Finally, I would remove the instrument cluster and see what I could find. Because of complexity, whole units sometimes have to be replaced.