GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views

1

Did you review the Exterior Lighting Systems Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Exterior Lighting Systems Description and Operation

2

Verify that one or more of the repeater lamps are inoperative.

Do the repeater lamps operate normally?

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

Go to Step 3

3

Do the turn signals operate correctly?

Go to Step 4

Go to Symptoms - Lighting Systems

4

Test the repeater lamp front turn signal lamp supply voltage and ground circuits for an open or high resistance. Refer to Circuit Testing in Wiring Systems.

Was a problem found?

Go to Step 5

Go to Step 6

5

Repair the open or high resistance in the repeater lamp front turn signal lamp supply voltage or ground circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 7

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6

Replace the inoperative bulb or socket.

Did you complete the repair?

Go to Step 7

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7

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3