* Power Distribution Center (PDC): This is the most common location. The PDC is typically found under the hood, often near the battery. It's a large fuse and relay box. You'll need to consult your owner's manual or a wiring diagram specific to your Ram's engine to identify the correct relay. The relay might be labeled, or you may have to trace wires to confirm.
* Under the dash: Less common, but some relays for cooling fans might be located under the dash, usually on the driver's side.
To find it, you'll need to:
1. Consult your owner's manual: This is the best place to start. It should have a diagram of the fuse and relay boxes, showing the location and function of each relay.
2. Use a wiring diagram: A wiring diagram specific to your year, make, model, and engine will precisely show the radiator fan relay's location and circuit. You can find these online through automotive repair sites (often subscription-based) or at auto parts stores.
3. Visually inspect the PDC: If your manual doesn't provide a clear answer, carefully examine the PDC. Look for relays that are similar in size and appearance. Many times, relays for cooling fans are grouped together.
Important Note: Before working on your vehicle's electrical system, always disconnect the negative battery terminal to prevent short circuits and accidental damage. If you're unsure about any aspect of this procedure, it's best to consult a qualified mechanic.
