Hummer H3. Manual — part 1428

VANITY MIRROR LAMP(S) INOPERATIVE

Vanity Mirror Lamp(s) Inoperative

Did you find and correct the condition?

Go to Step 13

Go to Step 8

7

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

Go to Step 13

Go to Step 10

8

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

Go to Step 13

Go to Step 11

9

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

Go to Step 13

Go to Step 12

10

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

Go to Step 13

-

11

Replace the turn signal/multifunction
switch. Refer to Turn Signal
Multifunction Switch Replacement .
Did you complete the repair?

Go to Step 13

-

12

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

Go to Step 13

-

13

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: Interior Lights Schematics
Connector End View Reference: Lighting Systems Connector End Views

Did you perform the Diagnostic System
Check - Vehicle?

Go to
Diagnostic

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

1

Go to Step 2

System Check -
Vehicle

2

Verify that the visor vanity mirror lamps are
inoperative.
Do the visor vanity mirror lamps operate
normally?

Go to Testing
for Intermittent
Conditions and
Poor
Connections

Go to Step 3

3

Connect a test lamp from the inadvertent
power courtesy lamps supply voltage circuit
above the headliner at the inoperative visor
vanity mirror connector to ground. Refer to
Circuit Testing .
Does the test lamp illuminate?

Go to Step 4

Go to Step 5

4

Connect a test lamp between the inadvertent
power courtesy lamps supply voltage circuit
and the ground circuit at the inoperative
visor vanity mirror lamp connector. Refer
to Circuit Testing .
Does the test lamp illuminate?

Go to Step 7

Go to Step 6

5

Repair the open, high resistance or short to
ground in the inadvertent power courtesy
lamps supply voltage circuit. Refer to
Wiring Repairs .
Is the repair complete?

Go to Step 8

-

6

Repair the open or high resistance in the
ground circuit. Refer to Wiring Repairs .
Is the repair complete?

Go to Step 8

-

7

1. Inspect the inoperative visor mirror

bulb for an open filament and replace
as necessary.

2. If the bulb is good, replace the

sunshade. Refer to Sunshade
Replacement .

Is the repair complete?

Go to Step 8

-

8

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

REPAIR INSTRUCTIONS

STOP LAMP SWITCH ADJUSTMENT

Fig. 88: View Of Brake Pedal
Courtesy of GENERAL MOTORS CORP.

1. Rotate the switch counterclockwise, allowing the retainer to release.

2. Pull the brake pedal rearward to full stop.

IMPORTANT: Do not move the brake pedal during switch adjustment as

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3

3. While holding the brake pedal FIRMLY in position rearward, push the switch inward fully

until the switch body contacts the brake pedal arm striker plate.

At this point the plunger in the switch should be pushed in.

4. Rotate the switch clockwise until a "click" is heard.

5. The switch is properly adjusted when there is 7 mm (0.028 in) clearance between the end of

the switch barrel and the striker plate on the brake pedal arm.

STOP LAMP SWITCH REPLACEMENT

Removal Procedure

1. Disconnect the stop lamp switch electrical connectors (1).

this will cause an over-adjusted switch which could cause
brake drag.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Lighting - H3