Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Master Electrical Component List .

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

1. Turn ON the ignition, with the engine OFF.
2. Turn the headlamp switch to the PARK position.

Do all of the park lamps illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Is only one lamp inoperative?

Go to Step 13

Go to Step 4

Using a scan tool, command the park lamps ON.

Do the park lamps illuminate?

Go to Step 5

Go to Step 6

1. Disconnect the scan tool.
2. Disconnect the turn signal/multifunction switch.
3. Connect a 3-amp fused jumper wire between the park lamp switch signal circuit of the turn signal/multifunction switch and a good ground.

Do the park lamps illuminate?

Go to Step 9

Go to Step 8

1. Remove the park lamps relay.
2. Probe the switch side battery positive voltage circuit of the park lamps relay with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 7

Go to Step 10

Connect a 10-amp fused jumper wire between the switch side battery positive voltage circuit of the park lamps relay and the park lamp supply voltage circuit of the park lamps relay.

Do the park lamps illuminate?

Go to Step 11

Go to Step 10

Test for an open or high resistance in the park lamp switch signal circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 12

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 18

Go to Step 14

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

Did you find and correct the condition?

Go to Step 18

Go to Step 15

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

Did you find and correct the condition?

Go to Step 18

Go to Step 16

Inspect for poor connections at the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 17

Repair an open, a high resistance, or a short to ground in the voltage supply circuit or the ground circuit of the inoperative lamp. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 18

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Replace the turn signal/multifunction switch. Refer to Turn Signal Multifunction Switch Replacement .

Did you complete the replacement?

Go to Step 18

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

Did you complete the replacement?

Go to Step 18

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Replace the park lamps relay. Refer to Relay Replacement .

Did you complete the replacement?

Go to Step 18

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

Did you complete the replacement?

Go to Step 18

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3