Hummer H3. Manual — part 1201

REDUCED VOLUME - ONE OR MORE SPEAKERS (W/O UM8)

Reduced Volume - One or More Speakers (w/o UM8)

Did you find and correct the condition?

Go to Step 9

Go to Step 7

7

Replace the speaker. Refer to Speaker
Replacement Reference.
Did you complete the replacement?

Go to Step 9

-

8

Replace the radio. Refer to Control
Module References for replacement, setup
and programming.
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 2

Step

Action

Yes

No

Schematic Reference: Radio/Navigation System Schematics
Connector End View Reference: Entertainment/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. Turn ON the ignition, with the

engine OFF.

2. Turn ON the radio.

3. Adjust the radio balance and fade

controls to each speaker.

Do all of the speakers operate properly?

Go to Testing
for Intermittent
Conditions and
Poor
Connections

Go to Step 3

3

1. Turn the ignition ON, with the

engine OFF.

2. Adjust the volume level.

3. Test the appropriate speaker output

circuits of the radio for A/C voltage.
Refer to Circuit Testing and
Wiring Repairs .

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3

SPEAKER REPLACEMENT REFERENCE

Speaker Replacement Reference

Did the A/C voltage fluctuate with the
audio output?

Go to Step 4

Go to Step 8

4

1. Turn OFF the ignition

2. Disconnect the radio.

3. Test the appropriate speaker output

circuits of the radio for high
resistance or an open. Refer to
Circuit Testing and Wiring
Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 5

5

Inspect for poor connections at the harness
connector of the radio. Refer to Testing
for Intermittent Conditions and Poor
Connections .
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 appropriate speaker.
Refer to Testing for Intermittent
Conditions and Poor Connections and
Connector Repairs .
Did you find and correct the condition?

Go to Step 9

Go to Step 7

7

Replace the speaker. Refer to Speaker
Replacement Reference.
Did you complete the replacement?

Go to Step 9

-

8

Replace the radio. Refer to Control
Module References for replacement,
setup and programming.
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 2

Component

Repair Instruction

Front Upper Speakers

Refer to Front Upper Speaker Replacement.

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3

SPEAKERS INOPERATIVE - ONE OR MORE

Schematic Reference: Radio/Navigation System Schematics

Connector End View Reference: Entertainment/Communication Connector End Views

Preliminary Information

Perform the Diagnostic System Check - Vehicle .

All Speakers Inoperative

With RPO UM8

1. Battery positive voltage circuit to the amplifier open-Test the battery positive voltage

circuit to the amplifier for an open. Refer to Circuit Testing and Wiring Repairs .

2. Ground circuit to the amplifier open-Test the ground circuit to the amplifier for an open.

Refer to Circuit Testing and Wiring Repairs .

3. Speaker output from the radio shorted-Test each speaker output of the radio for a short to

ground or short to voltage. Refer to Circuit Testing and Wiring Repairs .

4. No audio output from the amplifier-Replace the amplifier. Refer to Radio Speaker

Amplifier Replacement.

One Speaker Inoperative

Front Door Speakers

Refer to Radio Front Side Door Speaker
Replacement.

Rear Quarter Speakers

Refer to Radio Rear Quarter Trim Panel Speaker
Replacement.

Rear Door Speakers

Refer to Radio Rear Side Door Speaker
Replacement.

IMPORTANT: The following information lists the most probable cause of the

concern to the least probable cause followed by the appropriate
test for that condition. If the list leads to the replacement of a
component, always inspect for a poor connection before
proceeding with the replacement. Refer to Circuit Testing and
Wiring Repairs .

IMPORTANT: The following information lists the most probable cause of the

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3

Without RPO UQ7

1. Speaker output open-Test the appropriate speaker output circuits for an open. Refer to

Circuit Testing and Wiring Repairs .

2. No audio output from the radio-Test for any AC voltage between the appropriate speaker

output circuits at the speaker harness connector, disconnected with the radio volume
adjusted to 50 percent. If AC voltage is present, replace the speaker. Refer to Speaker
Replacement Reference. If no AC voltage is present, replace the radio. Refer to Control
Module References for replacement, setup and programming.

With RPO UQ7

1. Speaker output circuit from amplifier open-Test the appropriate speaker output circuits for

an open. Refer to Circuit Testing and Wiring Repairs .

2. No audio output from the amplifier-Test for any AC voltage between the appropriate

speaker output circuits at the speaker harness connector, disconnected with the radio volume
adjusted to 50 percent. If AC voltage is present, replace the speaker. Refer to Speaker
Replacement Reference. If no AC voltage is present, replace the amplifier. Refer to
Radio Speaker Amplifier Replacement.

Speakers - One Channel Inoperative

concern to the least probable cause. If the list leads to the
replacement of a component, always inspect for a poor
connection before proceeding with replacement. Refer to Circuit
Testing and Wiring Repairs .

IMPORTANT: The radio must be programmed after replacement. Refer to

Radio Setup. With RPO UM8, perform the Radio Setup.

IMPORTANT: With RPO Y91, Bose amplifier, perform the setup procedure

for the amplifier. Refer to Audio Amplifier Setup.

IMPORTANT: The following information lists the most probable cause of the

concern to the least probable cause. If the list leads to the
replacement of a component, always inspect for a poor
connection before proceeding with replacement. Refer to Circuit
Testing and Wiring Repairs .

2007 Hummer H3

2007 ACCESSORIES AND EQUIPMENT Cellular, Entertainment and Navigation - H3