Did you perform the Lighting System Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

Do the high beam headlamps operate properly?

--

Go to Step 3

Go to Headlamps Inoperative - High Beams

Important: The vehicle shift lever must be out of the PARK position in order for the DRL headlamps to operate.

1. Install a scan tool.
2. Turn ON the ignition a with engine Off.
3. With the scan tool, command the DRL relay ON and OFF in the dash integration module (DIM) output control list.

Did the DRL headlamps turn ON and OFF with each command?

--

Go to Step 14

Go to Step 4

1. Turn OFF the ignition.
2. Disconnect the DRL relay.
3. Turn ON the ignition with the engine OFF.
4. Probe the coil side feed circuit of the DRL relay with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

--

Go to Step 5

Go to Step 11

Probe the switch side feed circuit of the DRL relay with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 12

1. Turn OFF the ignition.
2. Disconnect the DRL relay.
3. Connect a test lamp from the coil side feed circuit of the DRL relay to the control circuit of the DRL relay.
4. Turn ON the ignition, with the engine OFF.
5. With a scan tool, command the DRL relay ON and OFF.

Does the test lamp turn ON and OFF with each command?

--

Go to Step 7

Go to Step 10

1. Turn OFF the ignition.
2. Connect a fused jumper between the DRL relay switch side feed circuit and the DRL supply voltage circuit at the DRL relay connector.
3. Turn ON the ignition, with the engine OFF.

Did the DRL headlamps illuminate?

--

Go to Step 8

Go to Step 13

Inspect for poor connections at the DRL headlamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 9

Replace the DRL headlamp relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the replacement?

--

Go to Step 18

--

Test for an open circuit or high resistance in the DRL relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 14

Repair open circuit in the DRL coil side feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 18

--

Repair open circuit in the DRL switch side feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 18

--

Repair open circuit in the DRL headlamp supply voltage feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 18

--

Inspect for poor connections at the DIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 18

Go to Step 15

Program the DIM. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Did you complete the DIM programming procedure?

--

Go to Step 16

--

Operate the system in order to verify the symptom is still present.

Does the symptom reoccur?

--

Go to Step 17

System OK

Replace the DIM. Refer to Dash Integration Module Replacement in Body Control System.

Is the replacement complete?

--

Go to Step 18

--

Operate the system in order to verify the repair.

Does the symptom reoccur?

--

Go to Step 2

System OK