For 1990-2009 cars

### Diagnostic Instructions

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

• | Review Strategy Based Diagnosis for an overview of the diangostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### DTC Descriptor

DTC B2530 00: Front Fog Lamp Control Circuit

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Front Fog Lamp Control Circuit | B2530 00 | B2530 00 | B2530 00 | --

### Circuit/System Description

Voltage is applied at all times to the fog lamp relay. When the fog lamp switch is placed in the ON position, a ground signal is applied to the body control module (BCM) through the fog lamp switch signal circuit. The BCM then applies a ground to the front fog lamp control circuit. This engages the fog lamp relay and applies voltage through the FOG LAMP fuse to the front fog lamps.

### Conditions for Running the DTC

The ignition is ON. Park lamps must be ON and the fog lamps must be commanded ON.

### Conditions for Setting the DTC

The BCM detects a short to ground, open, high resistance, or short to voltage on the front fog lamp control circuit.

### Action Taken When the DTC Sets

The fog lamps do not illuminate.

### Conditions for Clearing the DTC

• | The conditions for setting the DTC are no longer present.

• | A history DTC clears after 100 malfunction-free ignition cycles.

• | The BCM receives the clear code command from the scan tool.

### Reference Information

#### Schematic Reference

Fog Lights Schematics

#### Connector End View Reference

Lighting Systems Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

• | Scan Tool Output Controls

• | Scan Tool Data List

• | Scan Tool Data Definitions

### Circuit/System Verification

Ignition ON, activate the Fog Lamps output control on the scan tool. The Front Fog Lamp Relay Command parameter in the data list should display On and the front fog lamps should illuminate.

### Circuit/System Testing

1. Ignition OFF, disconnect the I/P fuse block connector J2 and test for a short to voltage, short to ground, an open, or high resistance at terminal 32.
2. Ignition ON, activate the fog lamps output control on the scan tool and test for a ground signal at the I/P fuse block connector terminal 32 .

⇒ | If a ground signal is present, replace the engine fuse block. If a ground signal is not present, replace the BCM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

For BCM replacement, setup, and programming refer to Control Module References .