Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Master Electrical Component List

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Are only the turn signal indicators in the instrument panel cluster (IPC) inoperative?

Go to Step 15

Go to Step 3

Is only one turn signal lamp inoperative?

Go to Step 4

Go to Step 5

Test the inoperative turn signal lamp supply voltage circuit for the following:

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 16

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With the scan tool, observe the RF, RR, LF, and LR Turn/Hazard Lamp Command parameters in the rear integration module (RIM) lighting data list.
4. Operate the turn signal switch from the left turn to right turn positions.

Does the scan tool indicate that the RF, RR, LF, and LR Turn/Hazard Lamp Command parameters change state with the turn signal switch?

Go to Step 12

Go to Step 6

1. Turn OFF the ignition.
2. Disconnect the C1 harness connector at the turn signal/multifunction switch.
3. Connect a 3-amp fused jumper between the right front turn signal switch signal circuit and ground.
4. Turn ON the ignition, with the engine OFF.

Do the right turn signals operate correctly?

Go to Step 7

Go to Step 8

1. Turn OFF the ignition.
2. Connect a 3-amp fused jumper between the left front turn signal switch signal circuit and ground.
3. Turn ON the ignition, with the engine OFF.

Do the left turn signals operate correctly?

Go to Step 9

Go to Step 8

Test the turn signal switch supply voltage circuit for the following:

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 10

Test the turn signal/multifunction switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 11

Inspect for poor connections at the C3 harness connector of the instrument panel module (IPM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 19

Inspect for poor connections at the C1 harness connector of 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 21

Go to Step 17

Test the ground circuits of the turn signal lamps for opens or high resistances. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 13

Test the supply voltage circuits of the turn signal lamps for opens or high resistances. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 14

Inspect for poor connections at the harness connector of the RIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 20

Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 21

Go to Step 18

Locate and repair an open or high resistance in the ground circuit of the inoperative turn signal lamp. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 21

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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 21

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

Did you complete the replacement?

Go to Step 21

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

Did you complete the replacement?

Go to Step 21

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

Did you complete the replacement?

Go to Step 21

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2