The PDC is usually a large black box with many relays and fuses. The repair manual will show you which relay controls the cooling fan(s) (there might be two, one for each speed or one for the primary fan and another for a secondary fan). The manual will also provide a relay layout diagram for the PDC. Without the diagram, it's difficult to provide the exact location.
To find the information you need:
1. Obtain a repair manual: A Haynes or Chilton manual specific to your year and model Jeep Grand Cherokee is highly recommended.
2. Use an online parts diagram: Some auto parts websites (like AutoZone or Advance Auto Parts) allow you to look up parts diagrams for your vehicle. These diagrams might show the PDC relay layout.
3. Search online forums: Jeep Grand Cherokee forums often have threads discussing relay locations and troubleshooting cooling fan issues. Searching for "2000 Jeep Grand Cherokee cooling fan relay location" might yield useful results, including pictures.
Important Note: Always disconnect the negative battery terminal before working on electrical components to prevent accidental short circuits.
