GM Service Manual Online
For 1990-2009 cars only

Stop Lamps Inoperative - Center High Mounted US and Canada

Step

Action

Value(s)

Yes

No

1

Has the Lighting Systems Diagnostic System Check been performed?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Disconnect the center high mount stop lamp connector.
  2. Connect a test light from the connector terminal A to ground.
  3. Press the brake pedal.

Does the test light illuminate?

--

Go to Step 4

Go to Step 3

3

Repair the open or high resistance in the stop lamp feed circuit 820.

Is the repair complete?

--

Go to Step 7

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4

  1. Connect a test light from the center high mount stop lamp connector terminals A to B.
  2. Press the brake pedal.

Does the test light illuminate?

--

Go to Step 6

Go to Step 5

5

Repair the open or high resistance in the ground circuit 150.

Is the repair complete?

--

Go to Step 7

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6

Replace the center high mount stop lamp. Refer to High Mount Stop Lamp Replacement .

Is the repair complete?

--

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 Diagnostic System Check - Lighting Systems