Hummer H3. Manual — part 1412

CLEARANCE LAMPS INOPERATIVE

Clearance Lamps Inoperative

8

Repair the open or high resistance in the
backup lamp supply voltage circuit or the
ground circuit.
Did you complete the repair?

Go to Step 11

-

9

Replace the inoperative bulb. Refer to
Backup Lamp Bulb Replacement.
Did you complete the replacement?

Go to Step 11

-

10

Adjust or replace the PNP switch if
equipped with an automatic transmission or
the backup lamp switch if equipped with a
manual transmission. Refer to Park/Neutral
Backup Switch Adjustment and
Park/Neutral Backup Switch
Replacement or Backup Lamp Switch
Replacement .
Did you complete the replacement?

Go to Step 11

-

11

Operate the system in order to verify the
repair.
Did you correct the condition?

System OK

Go to Step 3

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics
Connector End View Reference: Lighting Systems 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

Turn ON the park lamps.
Do the clearance lamps illuminate?

Go to Testing
for Intermittent
Conditions and
Poor
Connections

Go to Step 3

3

Are the park lamps illuminated?

Go to Park,
License and

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

COURTESY LAMPS ALWAYS ON

Courtesy Lamps Always On

Go to Step 4

Tail Lamps
Inoperative

4

Are all clearance lamps inoperative?

Go to Step 7

Go to Step 5

5

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

Go to Step 9

Go to Step 6

6

Inspect for poor connections at the harness
connector of the clearance lamp. Refer to
Circuit Testing and Wiring Repairs .
Did you find and correct the condition?

Go to Step 9

Go to Step 8

7

Repair the interior park lamps supply
voltage circuit of the clearance lamps for
the following:

An open

A high resistance

A short to ground

Refer to Circuit Testing and Wiring
Repairs .
Did you complete the repair?

Go to Step 9

-

8

Replace the affected
clearance/identification lamp. Refer to
Roof Clearance Lamp Bulb
Replacement or Roof Identification
Lamp Bulb Replacement.
Did you complete the replacement?

Go to Step 9

-

9

Operate the system in order to verify the
repair.
Did you correct the condition?

System OK

Go to Step 3

Step

Action

Yes

No

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

Schematic Reference: Interior Lights Schematics
Connector End View Reference: Lighting Systems Connector End Views, Data
Communication Connector End Views or Vehicle Access Connector End Views

1

Did you perform the Diagnostic System
Check - Vehicle?

Go to Step 2

Go to
Diagnostic
System Check -
Vehicle

2

Verify that the courtesy/dome lamps are
always on.
Do the courtesy/dome lamps operate
normally?

Go to Testing
for Intermittent
Conditions and
Poor
Connections

Go to Step 3

3

Inspect for the following related body
control module (BCM) module data
parameters. Refer to Scan Tool Data List
and

Scan Tool Data Definitions

for

typical values and definitions:

The courtesy lamp switch

The dome lamp override switch

The driver door ajar switch

The passenger door ajar switch

Was a problem found?

Go to Step 4

Go to Step 7

4

Disconnect and test the switch of the
affected input circuit for proper continuity
in the open and closed positions. Refer to
Circuit Testing .
Does the switch operate properly?

Go to Step 5

Go to Step 6

5

Test the signal and ground circuits of the
affected input circuit for the following:

A short to ground

An open

A high resistance

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

COURTESY LAMPS INOPERATIVE

Courtesy Lamps Inoperative

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

Go to Step 11

Go to Step 7

6

Inspect for poor connections at the harness
connector of the affected switch. Refer to
Circuit Testing and Wiring Repairs .
Did you find and correct the condition?

Go to Step 11

Go to Step 9

7

Test for a short to ground in any of the
courtesy lamp low control circuits.
Refer to Circuit Testing and Wiring
Repairs .
Did you find and correct the condition?

Go to Step 11

Go to Step 8

8

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

Go to Step 11

Go to Step 10

9

Replace the switch in the affected circuit.
Refer to one of the following replacement
procedures as applicable:

Headlamp Switch Replacement

Front Side Door Lock Replacement

Rear Door Lock Replacement

Endgate Latch Replacement

Did you complete the replacement?

Go to Step 11

-

10

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

Go to Step 11

-

11

Operate the system in order to verify the
repair.
Did you correct the condition?

System OK

Go to Step 3

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3