Did you perform the Headlight Diagnostic System Check?

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Go to Step 2

Go to Headlight System Check

1. Disconnect the BCM connector C1.
2. Press and hold the Flash-to-Pass switch.
3. Use the DMM in order to measure the voltage between terminal A4 of the BCM connector C1 and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 3

Go to Step 4

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

Did you complete the repair?

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Go to Step 9

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1. Disconnect the turn signal switch connector.
2. Use the DMM in order to measure the resistance between terminal 2 of the turn signal switch connector and terminal A4 of the BCM connector  C1.

Is the measured resistance less than the specified value?

5 ohms

Go to Step 6

Go to Step 5

1. Locate an open or a high resistance in circuits  M3 and/or M50.
2. Repair the open or the high resistance in circuits M3 and/or M50.

Did you complete the repair?

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Go to Step 9

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Use the DMM in order to measure the voltage between terminal 5 of the turn signal switch connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 8

Go to Step 7

1. Locate an open or a high resistance in circuit  A8.
2. Repair the open or the high resistance in circuit A8.

Did you complete the repair?

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Go to Step 9

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Replace the turn signal switch. Refer to Turn Signal Switch Replacement - On Vehicle in Steering Column On Vehicle Service.

Did you complete the repair?

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Go to Step 9

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1. Connect all connectors and components that were disconnected.
2. Verify that the flash to pass system operates properly.

Does the flash to pass system operate properly?

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Go to Headlight System Check

Go to Step 1