2010 Cadillac Truck SRX AWD V6-3.0L Page 308
states.
Circuit/System Testing
1. Ignition OFF, disconnect the appropriate KR42 daytime running lamp relay.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 86 and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
3. Connect a test lamp between the B+ circuit terminal 86 and the control circuit terminal 85.
4. Command the appropriate Front Park Lamp test with a scan tool. The test lamp should turn ON and OFF when changing between the
commanded states.
瀚慖f the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.
瀚慖f the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the K9 BCM.
5. If all circuits test normal, test or replace the KR42 daytime running lamp relay.
Component Testing
Relay Test
1. Ignition OFF, disconnect the appropriate KR42 daytime running lamp relay.
2. Test for 60-180 ohm between terminals 85 and 86.
瀚慖f not within the specified range, replace the KR42 daytime running lamp relay.
3. Test for infinite resistance between the following terminals:
* 30 and 86
* 30 and 87
* 30 and 85
* 85 and 87
瀚慖f not the specified value, replace the KR42 daytime running lamp relay.
4. Install a 15A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for
less than 2 ohm between terminals 30 and 87.
瀚慖f greater than the specified range, replace the KR42 daytime running lamp relay.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Headlamp Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Replacement)
* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay
Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power
Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming
B260C
DTC B260B or B260C
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 Descriptor
DTC B260B 01
- Left Daytime Running Lamp Relay Control Circuit Short to Battery
