To find it, you'll likely need to:
1. Consult a repair manual: A factory service manual or a Chilton/Haynes repair manual for your specific vehicle will have the most accurate location. These manuals often include diagrams showing the BCM's placement.
2. Carefully remove lower dashboard panels: This will involve removing screws and possibly clips. Be gentle to avoid breaking anything.
3. Look for a small, rectangular module: The BCM is usually a fairly small electronic control unit with numerous connectors.
4. Trace wiring harnesses: If you can't immediately locate it, follow the major wiring harnesses leading from the dashboard area; they'll often lead to the BCM.
Caution: Working on the vehicle's electrical system can be dangerous. If you're not comfortable doing this yourself, it's best to take your Caravan to a qualified mechanic.