GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Master Electrical Component List n Wiring Systems.

1

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Ensure that the brake pedal is not depressed.

Do the stop lamps remain OFF?

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 turn OFF?

Go to Step 4

Go to Step 5

4

Inspect the stop lamp switch adjustment. Refer to Stop Lamp Switch Adjustment .

Did you find and correct the condition?

Go to Step 7

Go to Step 6

5

Repair a short to battery positive voltage in the stop lamp switched circuit or the stop lamp supply voltage circuit. Refer to Wiring Repairs or to Connector Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 7

--

6

Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement .

Did you complete the replacement?

Go to Step 7

--

7

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3