Diagnostic Routine AC

Diagnostic Routine AC

Diagnostic Overview

An Individual Reversing Lamp Is Inoperative

Refer to Wiring Diagram Set 93 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Reversing Lamps - Automatic Transmission .

REFER to Reversing Lamps - Manual Transmission .

Visual Inspection and Diagnostic Pre-checks

- Inspect the bulb and make sure it is OK.

Pinpoint Test

1. CHECK FOR VOLTAGE TO THE REVERSING LAMP

1. Apply the parking brake.

2. Ignition OFF.

3. Disconnect: Inoperative Reversing Lamp.

4. Ignition ON.

5. Place the transmission in the reverse gear.

6. For 4-door vehicles, measure:





7. For 5-door vehicles, measure:





Is the voltage greater than 11 volts?







2. CHECK THE REVERSING LAMP GROUND CIRCUIT FOR AN OPEN

1. For 4-door vehicles, measure:





2. For 5-door vehicles, measure:





Is the voltage greater than 11 volts?







3. CHECK THE REVERSING LAMP SUPPLY CIRCUIT FOR AN OPEN

1. Disconnect: BCM (Body Control Module) C2280E.

2. For 4-door vehicles, measure:





3. For 5-door vehicles, measure:





Is the resistance less than 3 ohms?







4. 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?