Where is the rear compressor relay located on a 2000 Lincoln navigator?

The 2000 Lincoln Navigator's rear air compressor relay isn't located in a single, easily identifiable relay box like some other vehicles. Instead, it's often integrated into the Body Control Module (BCM) or a similar central control unit. There's no standard "relay" in the traditional sense for this system.

To find the problem, you'll need to:

1. Consult a wiring diagram: A wiring diagram specific to your 2000 Lincoln Navigator is crucial. This diagram will show you the path of the power from the BCM (or equivalent) to the rear air compressor. You can find these diagrams online through repair manuals (like Haynes or Chilton) or sometimes via online forums dedicated to Lincoln Navigators.

2. Check fuses: Before jumping to the BCM, check all fuses related to the air suspension system. A blown fuse is a much simpler and cheaper fix.

3. Use a multimeter: A multimeter can be used to trace the power going to the compressor. This will help determine if the problem is within the wiring, the BCM, or the compressor itself. Again, the wiring diagram is essential for this.

4. Professional Diagnosis: If you're not comfortable working with automotive electrical systems, a professional mechanic is the safest and often most efficient way to diagnose and repair the issue. They will have the tools and expertise to pinpoint the problem quickly.

In short: There's no easily accessible "rear compressor relay." The control is handled electronically within the vehicle's computer system. Professional diagnosis is highly recommended unless you have considerable automotive electrical experience.