Workshop Manuals Factory service & repair Vauxhall
Vauxhall Astra J05 · Body Systems
05 · Body & interior

High Mount Stop Lamp Inoperative

Make
Vauxhall
Model
Astra J
Section
Lighting › Other Information › High Mount Stop Lamp Inoperative
Body SystemsHigh Mount Stop Lamp Inoperative

High Mount Stop Lamp Inoperative

Diagnostic Instructions

•  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
•  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
•  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information



Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance

Center High Mounted Brake Lamp Control
1
1
2
B0655 5A

Center High Mounted Brake Lamp Ground
-
1
1
-

1. Center high mounted brake lamp always OFF

2. Center high mounted brake lamp ON
 

Circuit/System Description

The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The brake pedal position sensor provides an analog voltage signal to the body control module (BCM). The BCM will apply battery voltage to the right, left and center stop lamp control circuits and the trailer lighting converter. The trailer lighting converter receive also a serial data message from the BCM.

Reference Information


Schematic Reference

Exterior Lights Schematics


Connector End View Reference

Component Connector End Views


Description and Operation

Interior Lighting Systems Description and Operation


Electrical Information Reference


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

The E6 Center High Mounted Stop Lamp should be ON when the brake pedal is applied and OFF when the brake pedal is unapplied.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the E6 Center High Mounted Stop Lamp.
2. Disconnect the negative terminal of the C1 Battery.
3. Test for less than 5 Ω between the E6 Center High Mounted Stop Lamp ground circuit harness connector terminal 1 and ground.
⇒ If greater than the specified value, test the ground circuit for an open/high resistance.
4. Reconnect the negative terminal to the C1 Battery.
5. Connect a test lamp between the E6 Center High Mounted Stop Lamp control circuit harness connector terminal 2 and ground.
6. Command the Center Brake Lamp test with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
⇒ If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
⇒ If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
7. If all circuits test normal, replace the E6 Center High Mounted Stop Lamp.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•  Control Module References for BCM replacement, setup and programming

Parts & tools for this job For Vauxhall Astra

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