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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Body Control Module (BCM) - DTCS B10B3-14 To B182C-13) >> Diagnosis And Testing >> B163A-11-Front Left Turn Lamp Control - Circuit Short To Ground >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2014 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.

The Body Control Module (BCM) receives a communication network message from the Steering Column Control Module (SCCM) requesting turn signal lamp illumination. When this bus message is received, the BCM provides a pulsed voltage output through the front turn signal control circuit. The front turn signal control circuit connects to the dual filament Park and Turn Signal Lamp. For certain export applications, a single filament bulb is used and the Park Lamp function is in a separate lamp. The same ground circuit is used for both the Park and Turn Signal filaments in a dual filament lamp. For additional information on the Turn Signal Lamps operation, refer to OPERATION .

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