Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics

Connector End View Reference: Master Electrical Component List

DEFINITION: The headlamps are inoperative.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

1. Turn the ignition to the ON position, with the engine OFF.
2. Place the headlamp switch in the HEADLAMP position.
3. Place the headlamp dimmer switch in the HIGH BEAM position.

Do the HIGH beam headlamps illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Are both high beam headlamps inoperative?

Go to Step 6

Go to Step 4

1. Turn the ignition to the ON position.
2. Turn the headlamps switch to the HEAD position.
3. Turn the headlamp dimmer switch to the HIGH position.
4. Disconnect the inoperative high beam headlamp.
5. Using a test lamp connected to ground, probe the high beam voltage supply circuit.

Does the test lamp illuminate?

Go to Step 16

Go to Step 5

Test the high beam voltage supply circuit for a short to ground, an open, or a poor connection. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 14

Place the headlamp switch to the FTP position.

Do the high beam headlamp illuminate?

Go to Step 10

Go to Step 7

1. Remove the high beam relay.
2. Install a 10-amp fused jumper between battery positive voltage supply and the high beam switched voltage supply circuit.

Do the high beam headlamps illuminate?

Go to Step 8

Go to Step 14

1. Using a test lamp connected between the high beam relay coil side voltage supply circuit and the high beam relay control circuit.
2. Turn the ignition to the ON position.
3. Turn the headlamps to the HEAD position.
4. Turn the headlamp dimmer switch to the HIGH position.

Does the test lamp illuminate?

Go to Step 12

Go to Step 9

Test for a poor connection, an open, or a short to voltage in the headlamp high beam relay control circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 15

Test for a poor connection, an open, or a short to voltage in the headlamp switch high beam signal circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 11

1. Disconnect the body control module (BCM) connector C2.
2. Using a test light connected to ground, probe the headlamp switch high beam signal circuit.
3. Place the headlamp switch to the HIGH position.

Do the high beam headlamps illuminate?

Go to Step 15

Go to Step 13

Inspect for poor connections at the high beam relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 17

Inspect for poor connections at the turn signal/multifunction switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 18

Inspect for poor connections at the fuse block - underhood. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 19

Inspect for poor connections at the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 20

Repair an open or high resistance in the ground circuit of the inoperative headlamp. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 21

--

Replace the high beam relay. Refer to Relay Replacement .

Does the high beam headlamps operate normally?

Go to Step 21

Go to Step 14

Replace the headlamp switch. Refer to Turn Signal Multifunction Switch Replacement .

Did you complete the replacement?

Go to Step 21

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Replace the fuse block - underhood. Refer to Underhood Electrical Center or Junction Block Replacement .

Did you complete the replacement?

Go to Step 21

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Replace the BCM. Refer to Control Module References for BCM replacement, setup, and programming.

Did you complete the replacement?

Go to Step 21

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2