GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Connect a test lamp from CKT 16 (PPL) at the turn signal switch harness connector to chassis ground.
  2. Place the ignition switch in the RUN position.
  3. Place the turn signal switch in the left turn position.

Did the test lamp light?

--

Go to Step 4

Go to Step 2

2

Connect a test lamp from CKT 16 (PPL) at the turn/hazard flasher to chassis ground.

Is the repair complete?

--

Go to Step 5

Go to Step 3

3

Connect a test lamp from CKT 1540 (ORN) at the turn/hazard flasher to chassis ground.

Did the test lamp light?

--

Go to Step 6

Go to Step 7

4

Replace the turn signal switch.

Is the repair complete?

--

System OK

--

5

Locate and repair the open in CKT 16 (PPL) between the turn/hazard flasher and the turn signal switch.

Is the repair complete?

--

System OK

--

6

Replace the turn/hazard flasher.

Is the repair complete?

--

System OK

--

7

Locate and repair the open in CKT 1540 (ORN) between the IP fuse block and the turn/hazard flasher.

Is the repair complete?

--

System OK

--