B0528

DTC B0527, B0528, or B0529

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.

DTC Descriptor
DTC B0527
- Right Turn Signal Circuit Low

DTC B0528
- Right Turn Signal Circuit High

DTC B0529
- Right Turn Signal Circuit Open

Diagnostic Fault Information





Circuit/System Description

When the body control module (BCM) receives a right turn signal ON command from the turn signal switch, the BCM will apply voltage to the right rear stop/turn lamp control circuit and right turn signal lamps control circuit. The turn signal flasher is integrated within the BCM and will flash both circuits simultaneously.

Conditions for Running the DTC

The battery voltage must be between 9-16 volts.

Conditions for Setting the DTC

B0527

When the BCM receives a right turn signal command and the right front or rear turn lamp control circuit is shorted to ground.

B0528

When the BCM receives a right turn signal command and the right front or rear turn lamp control circuit is shorted to voltage.

B0529

When the BCM receives a right turn signal command and the right front or rear turn lamp control circuit is open.

Action Taken When the DTC Sets

The right front and/or right rear turn signals will not operate or will remain always on.

Conditions for Clearing the DTC

* This DTC will clear on current status after the condition for setting the fault is corrected.
* A history DTC will clear after 100 consecutive ignition cycles without a fault present.

Reference Information
Schematic Reference

Exterior Lights Schematics (Exterior Lights Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Exterior Lighting Systems Description and Operation (Exterior Lighting Systems Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)for Scan Tool Information

Circuit/System Verification

Ignition ON, operate the right turn signal and verify that the right front and rear turn signals flash.

If the right turn indicator does not illuminate or remains illuminated perform the Right Turn Signal Circuit Test.

Circuit/System Testing

Right Turn Signal Circuit Test
1. Ignition OFF, disconnect the harness connector at the affected turn signal bulb.
2. Verify that a test lamp illuminates when connected from battery voltage to the ground circuit terminal G.

• If the test lamp does not illuminate test the ground circuit for an open/high resistance.

3. Connect a test lamp between the control circuit terminal A and the ground circuit terminal G.
4. Ignition ON, operate the right turn signal and verify that the test lamp flashes.

• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.

• 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 BCM.

5. If all circuits test normal, test or replace the bulb.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Park/Turn Signal/Side Marker Lamp Bulb Replacement (Service and Repair)
* Tail Lamp Bulb Replacement (Service and Repair)
* Control Module References (Programming and Relearning)for BCM replacement, programming, and setup.