Schematic Reference: Exterior Lights Schematics

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

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

1. Place the ignition switch in the ON position.
2. Place the turn signal switch in the left position.
3. Place the turn signal switch in the right position.

Do the vehicle turn signals operate properly?

Go to Step 3

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

1. Connect the trailer connector to a trailer.
2. Place the turn signal switch in the left position.
3. Place the turn signal switch in the right position.
4. Observe the trailer towing indicator.

Does the trailer towing indicator illuminate?

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

Go to Step 4

Do the trailer turn signals operate properly?

Go to Step 5

Go to Step 9

1. Disconnect the turn signal hazard flasher.
2. Connect a 3-amp fused jumper between battery positive voltage and the trailer towing indicator circuit. Refer to Circuit Testing in Wiring Systems.

Does the trailer towing indicator illuminate?

Go to Step 8

Go to Step 6

Test for an open in the trailer towing indicator signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 7

Inspect for poor connections at the harness connector of the instrument panel 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 12

Go to Step 11

Inspect for poor connections at the harness connector of the turn signal hazard lamp flasher. 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 12

Go to Step 10

Repair the inoperative trailer turn signals.

Did you complete the repair?

Go to Step 12

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

Did you complete the replacement?

Go to Step 12

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Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement and the set up procedure?

Go to Step 12

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2