You'll need to consult your owner's manual or a wiring diagram to pinpoint the exact location within the PDC. The diagram will show you which relay is the radiator fan relay, and often have a label indicating this.
Without a wiring diagram, finding it precisely will require some detective work. Here's a general approach:
1. Locate the PDC: This is usually a large black plastic box under the hood, often near the battery.
2. Open the PDC cover: This will expose the relays and fuses.
3. Look for the relay diagram on the PDC cover: This diagram shows the layout of the relays and fuses. Find the one related to the cooling fan.
4. Visually inspect the relays: If there's no clear diagram, you might identify the fan relay by visually tracing wires leading to the radiator fan. This will require some electrical knowledge and is potentially more time consuming.
Caution: Always disconnect the negative battery terminal before working with any electrical components in your vehicle.
