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Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Body Control Module (BCM) - DTCS B106A-19 To B2229-62 - 500 - Electric) >> DTC Troubleshooting >> B16B7-12-Center High Mounted Stop Light - Circuit Short To Battery >> Theory Of Operation

Theory Of Operation

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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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