GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Exterior Lights System Check?

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Go to Step  2

Go to Exterior Lights System Check

2

  1. Disconnect the brake switch connector.
  2. Connect a fused jumper between terminal A and terminal B of the brake switch harness connector.
  3. Disconnect the high mounted stoplamp assembly connector.
  4. Connect a test lamp between terminal A of the high mounted stop lamp assembly harness connector and ground.

Does the test lamp illuminate?

--

Go to Step  3

Go to Step  4

3

Connect the test lamp between terminal A and terminal B of the high mounted stoplamp assembly harness connector.

Does the test lamp illuminate?

--

Go to Step  5

Go to Step  6

4

Repair the open in CKT 17 between S206 and the high mounted stop lamp assembly. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Exterior Lights System Check

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5

Replace the high mounted stop lamp assembly.

Did you complete the repair?

--

Go to Exterior Lights System Check

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6

Repair the open in CKT 150 between the high mounted stop lamp assembly and splice S330. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Exterior Lights System Check

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