Hummer H2. Manual — part 2644

Fig. 3: Stop Lamp Switch Component Views
Courtesy of GENERAL MOTORS CORP.

Callouts For Fig. 3

AUTOMATIC TRANSMISSION SHIFT LOCK CONTROL CONNECTOR END VIEWS

A/T Shift Lock/Park Lock Control Terminal Identification

Callout

Component Name

1

Vacuum Booster

2

Brake Pedal

3

Stop Lamp Switch

4

Accelerator Pedal

5

Stop Lamp Switch Retainer

6

Dash Panel

2004 Hummer H2

2004 TRANSMISSION Shift Lock Control - Hummer H2

Stop Lamp Terminal Identification Switch

Connector Part Information

z

12064762

z

6-Way F Metri-Pack 150 Series (GY)

Pin

Wire Color

Circuit No.

Function

A

BK

1050

Ground

B

L-GN/BK

584

Park Lock Control Solenoid Supply Voltage

C

YE

1996

Remote Shift Selector Signal

D

-

-

Not Used

E

D-GN/WH

1135

A/T Shift Lock Control Solenoid Supply Voltage

F

PK

1020

Ignition 0 Voltage

Connector Part Information

z

12040551

z

6-Way F Metri-Pack 480 Series (BK)

Pin

Wire Color

Circuit No.

Function

2004 Hummer H2

2004 TRANSMISSION Shift Lock Control - Hummer H2

DIAGNOSTIC INFORMATION AND PROCEDURES

DIAGNOSTIC STARTING POINT - AUTOMATIC TRANSMISSION SHIFT LOCK CONTROL

Begin the system diagnosis by reviewing the Automatic Transmission Shift Lock Control Description and
Operation . Reviewing the description and operation information will help you determine the correct symptom
diagnostic procedure when a malfunction exists. Reviewing the description and operation information will also
help you determine if the condition described by the customer is normal operation.

Refer to Symptoms - Automatic Transmission Shift Lock Control in order to identify the correct procedure
for diagnosing the system and where the procedure is located.

SYMPTOMS - AUTOMATIC TRANSMISSION SHIFT LOCK CONTROL

Visual/Physical Inspection

z

Inspect for aftermarket devices which could affect the operation of the automatic transmission shift lock
control system. Refer to Checking Aftermarket Accessories in Wiring Systems.

z

Inspect the easily accessible or visible system components for obvious damage or conditions which could
cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for
Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

z

Shift Lever Does Not Move with Brake Pedal Depressed

z

Shift Lever Can Be Moved without Brake Pedal Depressed

PARK LOCK SOLENOID INOPERATIVE

A

WH

17

Stop Lamp Switch Signal

B

OR

1540

Battery Positive Voltage

C

BN

441

Ignition 3 Voltage

D

PU

420

TCC Brake Switch/Cruise Control Release Signal

E

L-GN/BK

584

A/T Shift Lock Control Switch Supply Voltage

F

D-GN/WH

1135

A/T Shift Lock Control Solenoid Supply Voltage

IMPORTANT: Review the system operation in order to familiarize yourself with the system

functions. Refer to Automatic Transmission Shift Lock Control Description and
Operation .

2004 Hummer H2

2004 TRANSMISSION Shift Lock Control - Hummer H2

Park Lock Solenoid Inoperative

SHIFT LEVER DOES NOT MOVE WITH BRAKE PEDAL DEPRESSED

Shift Lever Does Not Move with Brake Pedal Depressed

Step

Action

Yes

No

Schematic Reference: Automatic Transmission Shift Lock Control Schematics
Connector End View Reference: Automatic Transmission Shift Lock Control Connector End
Views or Automatic Transmission Related Connector End Views
DEFINITION: Transmission shift lever does not lock in the PARK position with the ignition OFF.

1

Did you perform the Symptoms - Automatic
Transmission Shift Lock Control tests and perform all
the necessary inspections?

Go to

Step 2

Go to Symptoms - Automatic

Transmission Shift Lock

Control

2

1. Move the shift lever to the PARK position.

2. Turn OFF the ignition.

3. Press and hold the brake pedal.

4. Attempt to move the shift lever out of the PARK

position.

Does the shift lever move out of the park position?

Go to

Step 3

Go to Testing for Intermittent

Conditions and Poor

Connections in Wiring Systems

3

1. Disconnect the park lock solenoid.

2. Press and hold the brake pedal.

3. Attempt to move the shift lever out of the PARK

position.

Does the shift lever move out of the park position?

Go to

Step 4

Go to Step 5

4

Inspect for poor connections at park lock solenoid.
Refer to Testing for Intermittent Conditions and
Poor Connections and Connector Repairs in Wiring
Systems.
Did you find and correct the condition?

Go to

Step 7

Go to Step 6

5

Repair the short to battery voltage in the A/T shift lock
control switch supply voltage circuit. Refer to Circuit
Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?

Go to

Step 7

-

6

Replace the park lock solenoid. Refer to Automatic
Transmission Shift Lock Actuator Replacement .
Did you complete the repair?

Go to

Step 7

-

7

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

System

OK

Go to Step 2

Step

Action

Yes

No

Schematic Reference:Automatic Transmission Shift Lock Control Schematics
Connector End View Reference: Automatic Transmission Shift Lock Control Connector End

2004 Hummer H2

2004 TRANSMISSION Shift Lock Control - Hummer H2