Schematic Reference: Exterior Lights Schematics

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn ON the ignition, with the engine OFF.
2. Turn ON the headlamp switch.
3. Turn ON and OFF the headlamp high beam switch.
4. Turn OFF the headlamp switch.
5. Turn OFF the ignition.

Do the headlamps operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

1. Turn OFF the ignition.
2. Disconnect the headlamp relay.
3. Turn ON the ignition, with the engine OFF.

Do the headlamps turn OFF?

Go to Step 4

Go to Step 9

1. Turn OFF the ignition.
2. Reconnect the headlamp relay.
3. Disconnect the headlamp switch.
4. Turn ON the ignition, with the engine OFF.

Do the headlamps turn OFF?

Go to Step 11

Go to Step 5

1. Turn OFF the ignition.
2. Disconnect the body control module (BCM) connector C2.
3. Turn ON the ignition with the engine OFF.

Do the headlamps turn OFF?

Go to Step 7

Go to Step 6

1. Turn OFF the ignition.
2. Disconnect the body control module (BCM) connector C1.
3. Turn ON the ignition with the engine OFF.

Do the headlamps turn OFF?

Go to Step 12

Go to Step 8

Test the headlamp switch signal circuit for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and repair a short to ground in the headlamp switch signal circuit?

Go to Step 13

Go to Step 12

Test the headlamp relay control circuit for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and repair a short to ground in the headlamp switch signal circuit?

Go to Step 13

Go to Step 10

Repair the short to ground in the headlamp control circuit. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 13

--

Replace the headlamp relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the replacement?

Go to Step 13

--

Replace the headlamp switch. Refer to Headlamp Switch Replacement in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 13

--

Important: Perform the setup procedure for the body control module (BCM). Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 13

--

Connect all components and connectors then operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2