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Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Body Control Module (BCM) - DTCS B106A-19 To B2229-62 - 500 - Electric) >> DTC Troubleshooting >> B16B7-13-Center High Mounted Stop Light - Circuit Open >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

The Body Control Module (BCM) monitors the inputs from the Stop Lamp Switch. The Stop Lamp Switch contains a normally open switch and a normally closed switch. Separate fused ignition run/start voltage circuits supply the switches. When the BCM detects the brakes are applied, the BCM sends a voltage output to the Left and Right Tail Lamp Assemblies and Centered High Mounted Stop Lamp. A ground path for the lamps is present through the harness to the body sheet metal.

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