GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Turn the hazard switch ON.
  2. Connect a test lamp from CKT 27 (BRN) at the turn signal flasher harness connector to chassis ground.

Did the test lamp light?

--

Go to Step 3

Go to Step 2

2

Connect a test lamp from CKT 1540 (ORN) at the turn signal flasher harness connector to chassis ground.

Did the test lamp light?

--

Go to Step 4

Go to Step 5

3

Connect a test lamp from CKT 27 (BRN) at the hazard switch to chassis ground.

Did the test lamp light?

--

Go to Step 6

Go to Step 7

4

Replace the turn signal flasher.

Is the repair complete?

--

System OK

--

5

Locate and repair the open in CKT 1540 (ORN) between the turn signal flasher harness connector and the IP fuse block.

Is the repair complete?

--

System OK

--

6

Replace the hazard switch. Refer to Hazard Warning Switch Replacement - On Vehicle .

Is the repair complete?

--

System OK

--

7

Locate and repair the open in CKT 27 (BRN) between the turn signal flasher harness connector and the hazard switch harness connector.

Is the repair complete?

--

System OK

--