Did you perform the Exterior Lights System Check?

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Go to Step 2

Go to Exterior Lights System Check

Use a scan tool in order to read the current body control module (BCM) diagnostic trouble codes (DTCs).

Are any current DTCs set?

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Go to the Applicable DTC in Body Control System

Go to Step 3

Inspect the PRK LP fuse in the UBEC.

Is the PRK LP fuse open?

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Go to Step 12

Go to Step 4

Connect a test lamp between CKT 240 (ORN) at the headlamp switch and ground.

Does the test lamp light?

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Go to Step 6

Go to Step 5

Locate and repair the open in CKT 240 (ORN).

Is the repair complete?

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Go to Exterior Lights System Check

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1. Connect a test lamp between CKT 74 (LT BLU) at the headlamp switch and ground.
2. Move the headlamp switch to the PARK position.

Does the test lamp light?

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Go to Step 8

Go to Step 7

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

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Go to Exterior Lights System Check

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1. Remove the PRK LPS fuse from the IP Fuse Block.
2. Connect a test lamp between the feed side of the PRK LPS fuse at the IP fuse block and ground.

Does the test lamp light?

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Go to Step 10

Go to Step 9

Locate and repair the open in CKT 74 (LT BLU) between the headlamp switch and the IP Fuse Block.

Is the repair complete?

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Go to Exterior Lights System Check

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Backprobe between CKT 74 (LT BLU) cavity A4 connector C1 and ground of the UBEC.

Does the test lamp light?

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Go to Step 18

Go to Step 11

Locate and repair the open in CKT 74 (LT BLU) between the IP fuse block and the UBEC.

Is the repair complete?

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Go to Exterior Lights System Check

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1. Disconnect the headlamp switch.
2. Connect a test lamp between CKT 240 (ORN) and battery B+.

Does the test lamp light?

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Go to Step 13

Go to Step 14

1. Locate and repair the short to ground in CKT 240 (ORN).
2. Replace the PRK LP fuse in the UBEC.

Is the repair complete?

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Go to Exterior Lights System Check

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1. Remove the PRK LPS fuse from the IP fuse block.
2. Disconnect connector C1 from the UBEC.
3. Connect a test lamp between CKT 74 (LT BLU) cavity A at the headlamp switch and battery B+.

Does the test lamp light?

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Go to Step 15

Go to Step 16

Locate and repair the short to ground in CKT 74 (LT BLU).

Is the repair complete?

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Go to Exterior Lights System Check

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1. Reconnect the UBEC connector C1.
2. Remove the following components:

•	The fog lamp relay

•	The RR PRK fuse

•	The LR PRK fuse

•	The TRL PRK fuse

•	The FR PRK fuse

3. Connect a test lamp between CKT 74 (LT BLU) cavity A at the headlamp switch and battery B+.

Does the test lamp light?

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Go to Step 17

Go to Step 18

Replace the UBEC.

Is the repair complete?

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Go to Exterior Lights System Check

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Locate and repair the intermittent short to ground in CKT 240 (ORN) or CKT 74 (LT BLU).

Is the repair complete?

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Go to Exterior Lights System Check

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