Lamps/Lighting - Exterior: Operation: Notes

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

Following are paragraphs that briefly describe the operation of each of the major exterior lighting systems. The hard wired circuits and components of the exterior lighting systems may be diagnosed and tested using conventional diagnostic tools and procedures. Refer to SYSTEM WIRING DIAGRAMS .

However, conventional diagnostic methods may not prove conclusive in the diagnosis of the Body Control Module (BCM), the ElectroMechanical Instrument Cluster (EMIC), the Powertrain Control Module (PCM) or the Programmable Communications Interface (PCI) data bus. The most reliable, efficient, and accurate means to diagnose the BCM, the EMIC, the PCM, the PCI data bus or the electronic bus message inputs and outputs related to the various exterior lighting systems requires the use of a diagnostic scan tool. Refer to BODY DIAGNOSTIC PROCEDURES .