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. Observe the turn signal lamps and indicators.
3. Turn ON and OFF the right and left turn signal lamps.

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 all of the turn signals and indicators inoperative?

Go to Step 5

Go to Step 4

Are only the turn signal indicators inoperative?

Go to Step 12

Go to Step 7

1. Turn OFF the ignition.
2. Disconnect the turn signal and hazard flasher module.
3. Connect a test lamp between the turn signal and hazard flasher module battery positive voltage circuit and a good ground.
4. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 6

Go to Step 19

1. Turn OFF the ignition.
2. Connect a test lamp between the turn signal and hazard flasher module battery positive voltage circuit and the turn signal and hazard flasher module ground circuit.
3. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 10

Go to Step 20

1. Turn OFF the ignition.
2. Disconnect the inoperative turn signal bulb.
3. Connect a test lamp between the inoperative turn signal bulb supply voltage circuit and the inoperative turn signal bulb ground.
4. Turn ON the inoperative turn signal.

Does the test lamp flash ON and OFF?

Go to Step 18

Go to Step 8

Test the inoperative turn signal bulb voltage supply circuit for an open, high resistance 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 27

Go to Step 9

Test the inoperative turn ground circuit for a 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 27

Go to Step 10

1. Turn OFF the ignition.
2. Disconnect the turn signal switch.
3. Connect a test lamp between the turn signal switch ignition 1 voltage circuit and a good ground.
4. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 11

Go to Step 21

1. Turn OFF the ignition.
2. Reconnect the turn signal switch.
3. Disconnect the turn signal and hazard flasher module.
4. Connect a test lamp between the inoperative turn signal input circuit at the turn signal and hazard flasher module and a good ground.
5. Turn ON the inoperative turn signal.

Does the test lamp illuminate?

Go to Step 15

Go to Step 13

1. Turn OFF the ignition.
2. Disconnect the Instrument panel cluster (IPC).
3. Connect a test lamp between the inoperative turn signal indicator supply voltage circuit and the IPC ground circuit.
4. Turn ON the inoperative turn signal indicator.

Does the test lamp flash ON and OFF?

Go to Step 17

Go to Step 14

Test the inoperative turn signal input circuit for a 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 27

Go to Step 16

Test the inoperative turn signal indicator voltage supply circuit for a 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 27

Go to Step 22

Inspect for poor connections at the harness connector of the turn signal and 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 harness connector of 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 harness connector of the 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 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 27

Go to Step 26

Repair the open, high resistance or a short to ground in the turn signal and hazard flasher module battery positive voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 27

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Repair the open or high resistance in the turn signal and hazard flasher module ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 27

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Repair the open in turn signal switch ignition 1 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 27

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Repair the IPC ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 27

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Replace the turn signal and hazard flasher module. Refer to Hazard Lamp Flasher Replacement .

Did you complete the replacement?

Go to Step 27

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Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Did you complete the replacement?

Go to Step 27

--

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

Did you complete the replacement?

Go to Step 27

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Replace the inoperative turn signal bulb.

Did you complete the replacement?

Go to Step 27

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2