Chevrolet Silverado / GMC Sierra. Service manual — part 2961

Circuit/System Description

The driver door switch (DDS) and passenger door switch (PDS) control the power window
functions through the power window motor up and down control circuits. The door switches
monitor the control circuits for fault conditions when up or down operation is requested prior to
activating the function and during operation.

Conditions for Running the DTC

Battery voltage must be between 9-16 volts.

LR Window Switch B+

1, 3

3

-

-

Passenger Door Switch B+

2, 4

2

-

-

RR Window Switch B+

2, 4

4

-

-

Power Window Switch Right
Rear Down Signal

B3823 00

B3823 00

B3823 00

-

Power Window Switch Right
Rear Up Signal

B3822 00

B3822 00

B3822 00

-

Power Window Switch Left
Rear Down Signal

B3820 00

B3820 00

B3820 00

-

Power Window Switch Left
Rear Up Signal

B3819 00

B3819 00

B3819 00

-

Power Window Lockout Left
Rear Control

B3821 00

B3821 00

B3821 00

-

Power Window Lockout Right
Rear Control

B3824 00

B3824 00

B3824 00

-

LR Window Motor Control

3

3

3

-

Passenger Window Motor
Control

B3205 00

B3205 0B

B3205 00

-

RR Window Motor Control

4

4

4

-

Driver Window Motor
Control

B3205 00

B3205 0B

B3205 00

-

LR Window Switch Ground

-

3

3

-

RR Window Switch Ground

-

4

4

-

1. Driver Window Malfunction
2. Passenger Window Malfunction
3. Left Rear Window Malfunction
4. Right Rear Window Malfunction

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Fixed and Moveable Windows - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

The ignition switch is in the ON position.

Conditions for Setting the DTC

B3205 00

The DDS or PDS detects a short to ground or short to voltage on their respective window motor
control circuit.

B3205 0B

The DDS or PDS has detected excessive current flow on their respective window motor control
circuit.

Action Taken When the DTC Sets

The affected power window will be inoperative.

Conditions for Clearing the DTC

The DTC will be current for as long as the fault is present.

When the fault is no longer present, the DTC will be a history DTC.

A history DTC will clear after 50 ignition cycles.

Diagnostic Aids

The DTC can be set due to excessive physical resistance in the window regulator assembly.
Ensure proper mechanical operation of the regulator assembly prior to replacing electrical
components.

Reference Information

Schematic Reference

Moveable Window Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Windows Description and Operation

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Fixed and Moveable Windows - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Igntition ON, bserve the operation of the power windows while commanding each window UP
and DOWN by using their respective window switches, each window should perform the UP and
DOWN function.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate window motor.

2. Connect a test lamp between control circuit terminal A and control circuit terminal B.

3. Ignition ON, command the appropriate window UP and DOWN by using the respective

window switch. The test lamp should turn ON when commanding the UP and DOWN states.

If the test lamp is always OFF during either of the commands, test for a short to ground
or open/high resistance on either control circuit. If the circuits test normal, replace the
appropriate door switch.

If the test lamp is always ON, test for a short to voltage on either control circuit. If the
circuits test normal, replace the appropriate door switch.

4. If all circuits test normal, test or replace the appropriate window motor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate window motor.

2. Ignition ON, install a 25 amp fused jumper wire between the control terminal A and 12

volts. Momentarily install a jumper wire between the control terminal B and ground. The
appropriate window motor should perform the UP function.

If the function does not perform as specified, replace the appropriate window motor.

3. Reverse the jumper wires; the appropriate window motor should perform the DOWN

function.

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Fixed and Moveable Windows - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

If the function does not perform as specified, replace the appropriate window motor.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for DDS and PDS replacement, setup and programming.

Front Side Door Window Regulator Motor Replacement

DTC B3819, B3820, B3822, OR B3823

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B3819 00

Left Rear Window Up Control Circuit

DTC B3820 00

Left Rear Window Down Control Circuit

DTC B3822 00

Right Rear Window Up Control Circuit

DTC B3823 00

Right Rear Window Down Control Circuit

Diagnostic Fault Information

Circuit

Short to

Ground

Open/High

Resistance

Short to

Voltage

Signal

Performance

Driver Door Switch B+

U0199 00

U0199 00

-

-

LR Window Switch B+

1, 3

3

-

-

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Fixed and Moveable Windows - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado