Schematic Reference: Headlight Doors Schematics

Did you review the Exterior Lighting System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

Turn the headlamp switch to the ON position.

Do the headlamp doors open?

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

Go to Step 3

Are the headlamps ON?

Go to Step 4

Go to Low and High Beams Headlamps Inoperative

Are both headlamp doors inoperative?

Go to Step 6

Go to Step 5

1. Determine if the LH or RH headlamp door is inoperative.
2. Inspect the corresponding HDLP DR Fuse.

Is the LH or RH HDLP DR Fuse open?

Go to Step 17

Go to Step 9

1. Move the headlight switch to the OFF position.
2. Disconnect the headlamp door control module.
3. Probe the headlamps supply voltage circuit of the headlamp door control module connector with a test lamp that is connected to ground.
4. Move the headlight switch to the HEAD position.

Does the test lamp illuminate?

Go to Step 7

Go to Step 21

Probe the parklamp supply voltage circuit of the headlamp door control module connector with a test lamp that is connected to ground.

Does the test lamp illuminate?

Go to Step 8

Go to Step 22

Probe the ground circuit of the headlamp door control module connector with a test lamp that is connected to battery voltage.

Does the test lamp illuminate?

Go to Step 18

Go to Step 23

1. Move the headlight switch to the OFF position.
2. Disconnect the headlamp door control module connector.
3. Determine if the LH or RH headlamp door is inoperative.
4. Probe corresponding HDLP DR Fuse's battery positive voltage circuit of the headlamp door control module connector with a test lamp that is connected to ground.

Does the test lamp illuminate?

Go to Step 10

Go to Step 20

Is the inoperative headlamp door in the closed position?

Go to Step 11

Go to Step 13

1. Connect the headlamp door control module connector.
2. Disconnect the inoperative headlamp door motor connector.
3. Probe the headlamp door up circuit of the inoperative headlamp door motor connector with a test lamp that is connected to ground.
4. Place the headlight switch to the HEAD position.

Does the test lamp illuminate when the headlamp switch is placed in the HEAD position?

Go to Step 12

Go to Step 15

1. Move the headlight switch to the OFF position.
2. Connect a test lamp between the headlamp door up circuit and the headlamp door down circuit of the inoperative headlamp door motor connector.
3. Move the headlight switch to the HEAD position.

Does the test lamp illuminate when the headlamp switch is placed in the HEAD position?

Go to Step 19

Go to Step 16

1. Connect the headlamp door control module connector.
2. Place the headlight switch to the HEAD position.
3. Disconnect the inoperative headlamp door motor connector.
4. Probe the headlamp door down circuit of the inoperative headlamp door motor connector with a test lamp that is connected to ground.
5. Place the headlight switch to the OFF position.

Does the test lamp illuminate when the headlamp switch is placed in the OFF position?

Go to Step 14

Go to Step 16

1. Move the headlight switch to the HEAD position.
2. Connect a test lamp between the headlamp door up circuit and the headlamp door down circuit of the inoperative headlamp door motor connector.
3. Move the headlight switch to the OFF position.

Does the test lamp illuminate when the headlamp switch is placed in the OFF position?

Go to Step 19

Go to Step 15

Test for an open, high resistance or short to voltage in the headlamp door up circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair the condition?

Go to Step 26

Go to Step 18

Test for an open, high resistance, or short to voltage in the headlamp door down circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair the condition?

Go to Step 26

Go to Step 18

Test for a short to ground in the following circuits:

Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and repair the condition?

Go to Step 26

Go to Step 18

Inspect for poor connections at the harness connector of the headlamp door control module. 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 26

Go to Step 24

Inspect for poor connections at the harness connector of the headlamp door motor. 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 26

Go to Step 25

Repair an open or high resistance in the battery positive voltage circuit of the corresponding HDLP DR Fuse. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 26

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Repair an open or high resistance in the headlamp suuply voltage circuit of the headlamp door control module. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 26

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Repair an open or high resistance in the parklamps supply voltage circuit of the headlamp door control module. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 26

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

Did you complete the repair?

Go to Step 26

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Replace the headlamp door control module. Refer to Headlamp Motor/Actuator Replacement .

Did you complete the replacement?

Go to Step 26

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Replace the headlamp door motor. Refer to Headlamp Door Module Replacement .

Did you complete the replacement?

Go to Step 26

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2