Schematic Reference: Exterior Lights Schematics

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

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

Do the park lamps illuminate?

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

Go to Step 3

Is only one lamp inoperative?

Go to Step 4

Go to Step 5

1. Disconnect the inoperative lamp.
2. Probe the park lamp supply voltage circuit of the inoperative lamp with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 12

Go to Step 13

With a scan tool, command the park lamps ON.

Do the park lamps illuminate?

Go to Step 6

Go to Step 7

1. Place the headlamp switch in the OFF position.
2. Turn OFF the ignition.
3. Disconnect the body control module (BCM).
4. Place the headlamp switch in the PARK position.
5. Probe the park lamp switch ON input circuit with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 8

1. Disconnect the auto park lamp control relay.
2. Connect a 15 amp fused jumper wire between the switch side battery positive voltage circuit of the auto park lamp control relay and the parklamp supply voltage circuit of the auto park lamp control relay.

Do the park lamps illuminate?

Go Step 10

Go to Step 14

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

Did you find and correct the condition?

Go to Step 18

Go to Step 11

Inspect for poor connections at the harness connector of the BCM. 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 18

Go to Step 15

Inspect for poor connections at the auto park lamp control relay. 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 18

Go to Step 16

Inspect for poor connections at the harness connector of the turn/headlamp wiper switch assembly. 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 18

Go to Step 17

Repair an open or high resistance in the ground circuit of the inoperative park lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 18

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Repair an open or high resistance in the park lamp supply voltage circuit of the inoperative park lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 18

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Repair an open or high resistance in the park lamp supply voltage circuit between the underhood junction block and the RH IP junction block. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 18

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Important: Perform the set up procedure for the body control module.

Replace the body control module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 18

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Replace the auto park lamp control relay.

Did you complete the replacement?

Go to Step 18

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Replace the turn/headlamp wiper switch assembly. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column.

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