For 1990-2009 cars

## Trailer Towing Indicator Inoperative Pontiac Export

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Power and Grounding Connector End Views in Wiring Systems.
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 2 | Go to Symptoms - Lighting Systems
2 |

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 - Lighting Systems

3 |

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

4 | Do the trailer turn signals operate properly? | Go to Step 5 | Go to Step 9
5 |

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 illuminated?

Go to Step 8

Go to Step 6

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
7 | Inspect for poor connections at the harness connector of the instrument panel cluster. 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
8 | 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
9 | Repair the inoperative trailer turn signals. Did you complete the repair? | Go to Step 12 | --
10 | Replace the turn signal hazard flasher module. Refer to Hazard and Turn Signal Flasher Replacement . Did you complete the replacement? | Go to Step 12 | --
11 | Important: Perform the set up procedure for the IP. Replace the Instrument Cluster Panel (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement and the set up procedure? | Go to Step 12 | --
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2