Did you perform the Headlights System Check?

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Go to Step 2

Go to Headlight System Check

1. Disconnect the lamp control module (LCM) connector C2.
2. Cover the ambient light sensor.
3. Connect a J 39200 digital multimeter (DMM) between the LCM connector C2 terminal A5 (WHT) and ground.

Is the resistance greater than the specified value?

31 kohms

Go to Step 3

Go to Step 11

1. Expose the ambient light sensor to a bright incandescent light.
2. Connect a DMM between the LCM connector C2 terminal A5 (WHT) and ground.

Is the resistance less than the specified value?

23 kohms

Go to Step 4

Go to Step 11

1. Turn the ignition switch to the RUN position.
2. Connect a DMM between the LCM connector C2 terminal A7 (PNK) and ground.

Is the voltage within the specified range?

10-15 V

Go to Step 5

Go to Step 14

1. Connect a DMM between the LCM connector C2 terminal A8 (LT GRN) and ground.
2. Place the gear selector in the PARK position.

Is the voltage within the specified range?

10-15 V

Go to Step 6

Go to Step 15

1. Disconnect the LCM connector C1.
2. Connect a fused jumper between the LCM connector C1 cavity G (RED) and cavity D (DK BLU).

Do the high beam headlamps light at a reduced intensity?

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Go to Step 10

Go to Step 7

Test CKT 593 (DK BLU) between the LCM and the left high beam headlamp for an open or a short to ground. Refer to Testing for Short to Ground or Testing for Continuity in Wiring Systems.

Is there an open or short to ground in CKT 593?

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Go to Step 8

Go to Step 18

Test CKT 711 (DK GRN/WHT) between the underhood junction block and the left high beam headlamp for an open. Refer to Testing for Continuity in Wiring Systems.

Is there an open in CKT 711?

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Go to Step 9

Go to Step 18

Test CKT 311 (LT GRN) between the underhood junction block and the right high beam headlamp for an open. Refer to Testing for Continuity in Wiring Systems.

Is there an open in CKT 311?

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Go to Step 17

Go to Step 18

Replace the LCM. Refer to Headlamp Control Module Replacement .

Is the LCM replacement complete?

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Go to Headlight System Check

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Test CKT 278 (WHT) for an open or short to ground. Refer to Testing for Short to Ground or Testing for Continuity in Wiring Systems.

Is there an open or short to ground in CKT 278?

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Go to Step 12

Go to Step 18

Test CKT 351 (BLK/WHT) between the ambient light sensor and S213 for an open. Refer to Testing for Continuity in Wiring Systems.

Is there an open in CKT 351?

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Go to Step 13

Go to Step 18

Replace the ambient light sensor. Refer to Defroster Grille Replacement in Instrument Panel, Gauges, and Console.

Is the ambient light sensor replacement complete?

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Go to Headlight System Check

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Repair the open in CKT 39 (PNK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Headlight System Check

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Test CKT 275 (LT GRN) between the body control module (SBM) and the LCM for an open. Refer to Testing for Continuity in Wiring Systems.

Is there an open in CKT 275?

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Go to Step 16

Go to Step 18

Replace the LCM. Refer to Headlamp Control Module Replacement .

Is the LCM replacement complete?

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Go to Headlight System Check

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Repair the open in CKT 250 (BLK) between the right high beam headlamp and S101. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Headlight System Check

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Repair the faulty wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Headlight System Check

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