Schematic Reference: Exterior Lights Schematics

1

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. Operate the turn signals.

Do the turn signal lamps and indicators operate properly?

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

Go to Step 3

Are only the turn signal indicators inoperative?

Go to Step 6

Go to Step 4

Are all of the turn signal lamps and indicators inoperative?

Go to Step 7

Go to Step 5

Is there only one inoperative turn signal lamp?

Go to Step 10

Go to Step 14

1. Place the turn signal switch in the appropriate position.
2. With a scan tool, observe the appropriate Turn Signal parameter in the Instrument Cluster (IPC) inputs data list.

Does the scan tool indicate that the Turn Signal parameter is ON?

Go to Step 17

Go to Step 13

1. Turn OFF the ignition.
2. Disconnect the turn/hazard flasher module.
3. Turn ON the ignition, with the engine OFF.
4. Place the turn signal switch in the LEFT TURN position.
5. Connect a test lamp between the left turn signal input circuit and a good ground.
6. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 8

Go to Step 21

Connect a test lamp between the battery positive voltage circuit of the turn/hazard flasher module and a good ground.

Does the test lamp illuminate?

Go to Step 9

Go to Step 19

Connect a test lamp between the battery positive voltage circuit of the turn/hazard flasher module and the ground circuit of the turn/hazard flasher module .

Does the test lamp illuminate?

Go to Step 15

Go to Step 20

1. Turn OFF the ignition.
2. Disconnect the inoperative turn signal lamp.
3. Turn ON the ignition, with the engine OFF.
4. Connect a test lamp between the supply voltage circuit of the inoperative turn signal lamp and a good ground.
5. Place the turn signal switch in the appropriate position.

Does the test lamp flash ON and OFF?

Go to Step 11

Go to Step 12

Connect a test lamp between the supply voltage circuit of the inoperative turn signal lamp and the ground circuit of the inoperative turn signal lamp.

Does the test lamp flash ON and OFF?

Go to Step 18

Go to Step 22

Test for an open or high resistance in the supply voltage circuit of the inoperative turn signal lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 27

Go to Step 15

Test for an open or high resistance in the supply voltage circuit of the inoperative turn signal indicator. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 27

Go to Step 17

Test for an open or high resistance in the appropriate turn signal input circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 27

Go to Step 16

Inspect for poor connections at the harness connector of the turn/hazard flasher module. 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 27

Go to Step 23

Inspect for poor connections at the turn signal 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 27

Go to Step 24

Inspect for poor connections at the Instrument Cluster (IPC). 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 27

Go to Step 25

Inspect for poor connections at the inoperative turn signal lamp. 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 27

Go to Step 26

Repair an open or high resistance in the battery positive voltage circuit of the turn/hazard flasher module . Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 27

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Repair an open or high resistance in the ground circuit of the turn/hazard flasher module. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 27

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Repair an open or high resistance in the ignition 1 voltage circuit of the turn signal switch . Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 27

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Repair an open or high resistance in the ground circuit of the appropriate turn signal lamp. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 27

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Replace the turn/hazard flasher module. Refer to Hazard and Turn Signal Flasher Replacement .

Did you complete the replacement?

Go to Step 27

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Replace the turn signal switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 27

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Replace the Instrument Cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console.

Did you complete the repair?

Go to Step 27

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Replace the inoperative turn signal lamp. Refer to Park/Turn Signal Lamp Bulb Replacement or Tail/Turn Signal Lamp Replacement .

Did you complete the replacement?

Go to Step 27

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2