Diagnostic Routine K

Diagnostic Routine K

Diagnostic Overview

The Autolamps Are Inoperative

Refer to Wiring Diagram Set 85 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Autolamps .

REFER to Light Sensor .

Visual Inspection and Diagnostic Pre-checks

- Make sure the manual operation of the headlamps and parking lamps operates correctly before diagnosing the autolamp system.

- Inspect the light sensor for damage.

Pinpoint Test

1. CHECK FOR VOLTAGE TO THE LIGHT SENSOR

1. Ignition OFF.

2. Disconnect: Light Sensor.

3. Ignition ON.

4. Measure:





Is the voltage approximately 5 volts?







2. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Disconnect the BCM (Body Control Module) connectors.

2. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

3. Reconnect and inspect all BCM (Body Control Module) connectors. Make sure they seat and latch correctly.

4. Operate the system and determine if the concern is still present.

Is the concern still present?