Hummer H3. Manual — part 1402

DTC B0532, B0533 OR B0534

Circuit Description

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

DTC Descriptors

This diagnostic procedure supports the following DTCs:

to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?

Go to Step 12

Go to Step 9

8

Inspect for poor connections at the IPC.
Refer to Circuit Testing and Wiring
Repairs .
Did you find and correct the condition?

Go to Step 12

Go to Step 10

9

Inspect for poor connections at the harness
connector of the body control module
(BCM). Refer to Circuit Testing and
Wiring Repairs .
Did you find and correct the condition?

Go to Step 12

Go to Step 11

10

Replace the IPC. Refer to Control
Module References for replacement,
setup and programming.
Did you complete the replacement?

Go to Step 12

-

11

Replace the BCM. Refer to Control
Module References for replacement,
setup and programming.
Did you complete the replacement?

Go to Step 12

-

12

1. Use the scan tool in order to clear the

DTCs.

2. Operate the vehicle within the

Conditions for Running the DTC as
specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

DTC B0532 Left Turn Signal Circuit Low

DTC B0533 Left Turn Signal Circuit High

DTC B0534 Left Turn Signal Circuit Open

Conditions for Running the DTC

The battery voltage must be between 9-16 volts.

Conditions for Setting the DTC

When the BCM receives a left turn signal command and the left rear stop/turn lamp supply
voltage circuit is open, shorted to ground or shorted to voltage

When the BCM receives a left turn signal command and the left turn signal lamps supply
voltage circuit is shorted to ground or shorted to voltage

Action Taken When the DTC Sets

The left front and/or left rear turn signals will not operate or will remain always ON.

Conditions for Clearing the MIL/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.

History and current DTCs can be cleared using a scan tool.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

3: This step tests for supply voltage and ground at the inoperative bulb socket.

4: This step tests if battery positive voltage is constantly being applied to the supply voltage
circuit.

5: This step tests if a condition exists in the supply voltage circuit.

6: This step tests if a condition exists in the ground circuit.

12: After replacement of the instrument panel cluster (IPC), you must calibrate the new
cluster for proper operation.

14: After replacement of the BCM, you must calibrate the new module for proper
operation.

DTC B0532, B0533 or B0534

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

Step

Action

Yes

No

Schematic Reference: Fog Lights Schematics
Connector End View Reference: Lighting Systems Connector End Views, Displays
and Gages Connector End Views or Data Communication Connector End Views

1

Did you perform the Diagnostic System
Check - Vehicle?

Go to Step 2

Go to
Diagnostic
System Check -
Vehicle

2

1. Install a scan tool.

2. Turn ON the ignition, with the engine

OFF.

3. With a scan tool, command the

inoperative turn signal ON and OFF.

Does the inoperative turn signal operate
ON and OFF with each command?

Go to Testing
for Intermittent
Conditions and
Poor
Connections

Go to Step 3

3

1. Turn OFF the ignition.

2. Remove the inoperative bulb. Refer to

Daytime Running Lamp Bulb
Replacement, Tail Lamp Bulb
Replacement, Instrument Cluster
Replacement (Left Hand Drive) or
Instrument Cluster Replacement
(Right Hand Drive) .

3. Turn ON the ignition, with the engine

OFF.

4. Connect a test lamp between the

ground circuit and the supply voltage
circuit of the inoperative bulb socket.

5. With a scan tool, command the

inoperative turn signal ON and OFF.

Does the test lamp illuminate?

Go to Step 4

Go to Step 5

4

Does the test lamp remain illuminated with
each command?

Go to Step 7

Go to Step 8

Test for a short to ground, open or high
resistance in the supply voltage circuit.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

5

Refer to Circuit Testing and Wiring
Repairs .
Did you find and correct the condition?

Go to Step 15

Go to Step 6

6

Test for an open or high resistance in the
ground circuit. Refer to Circuit Testing
and Wiring Repairs .
Did you find and correct the condition?

Go to Step 15

Go to Step 11

7

Test the supply voltage circuit for a short to
voltage. Refer to Circuit Testing and
Wiring Repairs .
Did you find and correct the condition?

Go to Step 15

Go to Step 11

8

Does the condition only exist with the turn
signal indicator in the instrument panel
cluster (IPC)?

Go to Step 9

Go to Step 10

9

Inspect for poor connections at the IPC.
Refer to Circuit Testing and Wiring
Repairs .
Did you find and correct the condition?

Go to Step 15

Go to Step 12

10

Inspect for poor connections at the
inoperative bulb socket. Refer to Circuit
Testing and Wiring Repairs .
Did you find and correct the condition?

Go to Step 15

Go to Step 13

11

Inspect for poor connections at the harness
connector of the body control module
(BCM). Refer to Circuit Testing and
Wiring Repairs .
Did you find and correct the condition?

Go to Step 15

Go to Step 14

12

Replace the IPC. Refer to Control
Module References for replacement, setup
and programming.
Did you complete the replacement?

Go to Step 15

-

13

Replace the inoperative bulb. Refer To
Daytime Running Lamp Bulb
Replacement or Tail Lamp Bulb
Replacement.
Did you complete the replacement?

Go to Step 15

-

Replace the BCM. Refer to Control
Module References for replacement, setup

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3