Instead of a simple relay, the system likely uses:
* PCM (Powertrain Control Module): This is the "brain" of the system and determines when and how fast the fan should run based on various engine sensors.
* Fan control module (possibly integrated into another module): This module receives commands from the PCM and directly controls the fan motor. It might be integrated within another module near the radiator, or it might be part of a larger body control module.
Troubleshooting a non-working fan: Because it's not a simple relay swap, diagnosing a malfunctioning fan requires a more sophisticated approach. You'll likely need:
* A multimeter: To test voltage at the fan motor itself and at various points in the circuit.
* A wiring diagram: A factory service manual or a reputable online resource is essential. These diagrams will show the path of the power and control signals.
* Knowledge of automotive electrical systems: Attempting to troubleshoot without this knowledge could lead to further damage.
Recommendation: If your fan isn't working, it's strongly advised to take your Jeep to a qualified mechanic for diagnosis and repair. Trying to trace the circuit without the right tools and expertise could be time-consuming and potentially dangerous.
