Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn OFF the ignition.
2. Turn OFF the twilight sentinel switch.
3. Turn the park lamps ON and OFF.

Do the park lamps operate properly?

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

Go to Step 3

1. Remove the inoperative park lamp bulb.
2. Connect a test lamp between the inoperative park lamp bulb park lamp supply voltage circuit and inoperative park lamp bulb ground circuit.
3. Turn ON the park lamps.

Does the test lamp illuminate?

Go to Step 13

Go to Step 4

Test the park lamp supply voltage circuit for high resistance, an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 5

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

Did you find and correct the condition?

Go to Step 18

Go to Step 6

1. Disconnect the lamp control module (LCM).
2. Connect a test lamp between battery positive voltage and the park lamp switch on signal circuit.
3. Turn the park lamp switch ON and OFF.

Does the test lamp turn ON and OFF with the park lamp switch?

Go to Step 7

Go to Step 8

1. Connect a test lamp between the PK LP fuse battery positive voltage circuit of the LCM and a good ground.
2. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 10

Go to Step 14

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

Did you find and correct the condition?

Go to Step 18

Go to Step 9

Test the headlamp switch ground circuit for high resistance or an open. 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

Test the LCM ground circuits for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 18

Go to Step 12

Inspect for poor connections at the harness connector of the headlamp switch. 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 harness connector of the LCM. 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 inoperative park lamp bulb. 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 the open, high resistance or short to ground in the PK LP fuse battery positive voltage circuit of the LCM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 18

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Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Did you complete the replacement?

Go to Step 18

--

Replace the LCM. Refer to Lamp Control Module Replacement .

Did you complete the replacement?

Go to Step 18

--

Replace the inoperative park lamp bulb.

Did you complete the replacement?

Go to Step 18

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2