Wednesday, December 4, 2019

2010 Cadillac Truck Escalade AWD V8-6.2L Page 785

2010 Cadillac Truck Escalade AWD V8-6.2L Page 785

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC B3884 00

- Center High Mounted Stop Lamp (CHMSL) Circuit

Diagnostic Fault Information

Circuit/System Description

North American or European

The stop lamp switch is used to sense the action of the driver application of the brake pedal. The body control module (BCM) provides a low

reference signal and a B+ reference voltage to the stop lamp switch. When the stop lamp switch contacts close indicating the brakes have been

applied, the BCM will apply battery voltage to stop lamp relay control circuit and the center high mounted stop lamp (CHMSL). When the stop

lamp relay receives battery voltage from the BCM, the relay coil is energized and the stop lamp relay switch contacts close applying battery voltage

to the STOP LAMPS fuse to illuminate the left and right stop lamps.

Conditions for Running the DTC

* The ignition is ON.

* The stop lamps must be commanded ON.

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