To be certain, it's best to:
* Consult your owner's manual: This is the most reliable source for the specific location in your vehicle.
* Look for a large, rectangular black box with numerous connectors: The ECM is usually a fairly substantial component.
* Use a repair manual: A Haynes or Chilton repair manual for your specific year and model Dodge Ram Van will provide diagrams and detailed instructions.
* Search online forums: Searching for "2000 Dodge Ram Van ECM location" on automotive forums might reveal pictures and discussions from other owners who have located theirs.
Caution: Always disconnect the negative battery terminal before working near the ECM to prevent accidental damage.