2010 Cadillac Truck SRX AWD V6-3.0L Page 683

2010 Cadillac Truck SRX AWD V6-3.0L Page 683

Headlights/Daytime Running Lights (DRL) Schematics (See: Diagrams/Electrical Diagrams/Lighting and Horns/System

Diagram/Headlights/Daytime Running Lights (DRL) Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Exterior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Exterior Lighting Systems)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool High Beam Select Switch parameter while pulling and releasing the turn signal/multi-function switch. The value

should change between Inactive and Active when changing between the selected states.

Circuit/System Testing

1. Ignition OFF, disconnect at the S78 turn signal/multifunction switch.

2. Ignition ON, verify that the scan tool High Beam Select Switch parameter is Inactive.

瀚慖f not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K9 BCM.

3. Connect a 3 A fused jumper wire between the signal circuit terminal 2 and ground, verify that the scan tool High Beam Select Switch

parameter is Active.

瀚慖f not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9

BCM.

4. If all circuits test normal, test or replace the S78 turn signal/multifunction switch.

Component Testing

Turn Signal/Multifunction Switch Test

1. Ignition OFF, disconnect the harness connector at the S78 turn signal/multifunction switch.

2. Test for Infinite resistance between the terminals listed below with the switch in the open position.

* Signal terminal 2 and ground terminal 3

* Signal terminal 4 and ground terminal 3

瀚慖f not the specified value, replace the S78 turn signal/multifunction switch.

3. Test for less than 2 ohm between the signal terminal 2 and the ground terminal 3 with the switch in the high beam position.

瀚慖f greater than the specified value, replace the S78 turn signal/multifunction switch.

4. Test for less than 2 ohm between the signal terminal 4 and the ground terminal 3 while holding the switch in the flash to pass position.

瀚慖f greater than the specified value, replace the S78 turn signal/multifunction switch.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Turn Signal Multifunction Switch Replacement (See: Lighting and Horns/Sensors and Switches - Lighting and Horns/Turn Signal

Switch/Service and Repair/Turn Signal Multifunction Switch Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for BCM replacement, programming and setup