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 the stop lamps are always on.

Do the stop lamps operate normally?

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

Go to Step 3

3

Disconnect the stop lamp switch.

Do the stop lamps remain illuminated?

Go to Step 4

Go to Step 7

4

Disconnect the multifunction turn signal switch and test for a short to voltage in the stop lamp switch signal circuit. Refer to Circuit Testing in Wiring Systems.

Was a problem found?

Go to Step 5

Go to Step 6

5

Repair the short to voltage in the stop lamp switch signal circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 8

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6

Replace the multifunction switch turn signal switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.

Did you complete the repair?

Go to Step 8

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7

Adjust or replace the stop lamp switch. Refer to Stop Lamp Switch Replacement .

Did you complete the repair?

Go to Step 8

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8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3