2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 598
* Accessory Switch Replacement (See: Instrument Panel, Gauges and Warning Indicators/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, programming and setup
B2750
DTC B2750
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC B2750 01
- Horn Relay Secondary Circuit Short to Battery
DTC B2750 02
- Horn Relay Secondary Circuit Short to Ground
DTC B2750 04
- Horn Relay Secondary Circuit Open
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) provides a ground for the Horn PCB relay within the underhood fuse block. The underhood fuse block will then
provide B+ voltage to the horn control circuit, sounding the horn.
Conditions for Running the DTC
When the horn output is actively being requested by the BCM.
Conditions for Setting the DTC
B2750 01
The BCM detects a short to voltage in the horn relay control circuit.
B2750 02
The BCM detects a short to ground in the horn relay control circuit.
B2750 04
The BCM detects an open/high resistance in the horn relay control circuit.
Action Taken When the DTC Sets
B2750 01, B2750 04
The horn will be inoperative.
