* Under the hood, in the Power Distribution Center (PDC): This is the most common location. The PDC is a large black box, often near the battery or firewall. The relays are usually within this box, and may be labeled or you may need to consult a wiring diagram to identify the correct one.
* Under the dashboard: Less common, but possible. This would be part of an interior fuse box.
To find it, you'll need to:
1. Consult your owner's manual: Your owner's manual should have a diagram of the fuse box(es) and relay locations. This is the best starting point.
2. Look at a wiring diagram: A wiring diagram specific to your 1999 Dodge Caravan's engine (3.0L, 3.3L, or 3.8L) will clearly show the radiator fan relay location and its circuit. You can usually find these diagrams online (search for "1999 Dodge Caravan wiring diagram" + your engine size).
3. Examine the Power Distribution Center (PDC): If your manual doesn't show a clear location, carefully open the PDC (often a few clips or screws hold the cover on). Look for relays that are similar in size and appearance. Many relays will have their function printed on them, but it's not guaranteed.
Important Considerations:
* Multiple Relays: Some Caravans might have multiple relays related to the cooling fan (one for high speed, one for low speed, etc.).
* Caution with Electricity: Be careful when working with electrical components. Disconnect the battery's negative terminal before working on any electrical connections.
If you can't locate it after trying these steps, it's best to consult a mechanic or an auto parts store. They can often help identify the relay based on your vehicle's specifics.
