Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Master Electrical Component List

DEFINITION: One or more stop lamps are inoperative or operate dim.

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Depress the brake pedal.

Do all of the stop lamps illuminate?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Is only one lamp inoperative?

Go to Step 4

Go to Step 7

1. Disconnect the inoperative lamp.
2. Using a test lamp connected to ground, probe the stop lamp supply voltage circuit.
3. Depress the brake pedal.

Does the test lamp illuminate?

Go to Step 6

Go to Step 5

Test for a poor connection, open, or a short to ground in the stop lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 9

Test for a poor connection or an open in the ground circuit of the inoperative stop lamp. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 8

Test for a poor connection or an open in the brake pedal position sensor signal circuit of the brake pedal position sensor. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 9

Replace the inoperative stop lamp. Refer to the following:

Did you complete the repair?

Go to Step 10

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Replace the body control module (BCM). Refer to Control Module References for replacement, setup, and programming.

Did you complete the repair?

Go to Step 10

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3