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DTC B2530

The front fog lamp relay is supplied with battery voltage at all times. The front fog lamp switch signal circuit is grounded through a resistor momentarily by pressing the front fog lamp switch. The body control module (BCM) energises the front fog lamp relay by applying ground to the front fog lamp relay control circuit. When the front fog lamp relay is energised, the relay switch contacts close and battery voltage is applied through the front fog lamp fuse to the front fog lamp supply voltage circuit which illuminates the front fog lamps.

Front fog lamps activated

B2530 01

The BCM detects a short to voltage on the control circuit.

B2530 02

The BCM detects a short to ground on the control circuit.

B2530 04

The BCM detects an open control circuit.

The front fog lamps are inoperative.

The condition for setting the DTC is no longer present.

Schematic Reference

Fog Lamps Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Exterior Lighting Systems Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, perform the Front Fog Lamps Relay test. The front fog lamps should be ON/OFF.

1. Ignition OFF, disconnect the X2 harness connector at the X50A Fuse Block - Underhood.
2. Connect a test lamp between the control circuit terminal 19 X2 of the X50A Fuse Block - Underbonnet and B+.
3. Ignition ON, perform the Front Fog Lamps Relay test. The test lamp should turn ON and OFF when changing between the commanded states.

⇒	If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 Body Control Module.

⇒	If 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 Body Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.