2010 Cadillac Truck SRX FWD V6-3.0L Page 718

2010 Cadillac Truck SRX FWD V6-3.0L Page 718

2. Test for infinite resistance between the control circuit terminal listed below and ground:

* Right trailer park lamp control terminal 16

* Left trailer park lamp control terminal 4

瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the X88 trailer connector.

3. Test for less than 1 ohm between the control circuit terminals listed below:

* Control terminal 16 at the K68 trailer lighting control module and control terminal 5 at the X88 trailer connector.

* Control terminal 4 at the K68 trailer lighting control module and control terminal 7 at the X88 trailer connector.

瀚慖f greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the X88 trailer connector.

4. If all the circuits test normal, replace the K68 trailer lighting control module.

Repair Instructions

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

Control Module References (See: Testing and Inspection/Programming and Relearning) for trailer brake control module replacement,

programming and setup

B3886

DTC B3885 or B3886

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B3885 02

- Trailer Left Tail Lamp Circuit Short to Ground

DTC B3885 04

- Trailer Left Tail Lamp Circuit Open

DTC B3886 02

- Trailer Right Tail Lamp Circuit Short to Ground

DTC B3886 04

- Trailer Right Tail Lamp Circuit Open

Diagnostic Fault Information

Circuit/System Description

The trailer brake control module will receive a serial data message from the body control module (BCM) indicating that the vehicle park lamps

have been activated. The trailer brake control module will then apply system voltage to the trailer tail lamps through their respective voltage supply

circuits.

Conditions for Running the DTC

When the parking lamps are turned on.

Conditions for Setting the DTC