GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Horns System Check performed?

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Go to Step 2

Go to Horns System Check

2

  1. Disconnect the inoperative horn.
  2. Connect a test lamp between the horn connector terminal B and ground.
  3. Press the horn switch.

Does the test lamp light?

--

Go to Step 4

Go to Step 3

3

Repair the open in CKT 29 (DK GRN).

Is the repair complete?

--

Go to Horns System Check

--

4

  1. Connect a test lamp between the horn connector terminal B and terminal A.
  2. Press the horn switch.

Did the test lamp light?

--

Go to Step 6

Go to Step 5

5

Repair the open in CKT 650 (BLK).

Is the repair complete?

--

Go to Horns System Check

--

6

  1. Verify that the horn connector is clean and tight.
  2. If the connector is OK, replace the horn.

Is the repair complete?

--

Go to Horns System Check

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