GM Service Manual Online
For 1990-2009 cars only

LEFT TURN indicator Inoperative

Step

Action

Value(s)

Yes

No

1

Activate the turn signal switch so that the LH turn signal lamp is ON.

Do both the front and rear LH exterior turn signal lamps illuminate?

--

Go to Step 2

Go to Exterior Lights Diagnostic System Check

2

  1. Disconnect the instrument cluster connector.
  2. Connect a test light between terminal A15 of the instrument cluster connector and ground.
  3. Activate the turn signal switch so that the LH turn signal lamp is ON.

Does the test light pulse ON and OFF?

--

Go to Step 4

Go to Step 3

3

Locate and repair an open or high resistance in CKT 14 between the instrument cluster connector and the instrument panel electrical center connector C1.

Is the repair complete?

--

Go to Exterior Lights Diagnostic System Check

--

4

Check the instrument panel cluster connector and LH turn signal indicator bulb for an open circuit.

Is the instrument panel cluster connector and LH turn signal indicator bulb in normal condition?

--

Go to Step 5

Go to Step 6

5

Replace the instrument cluster.

Is the repair complete?

--

Go to Exterior Lights Diagnostic System Check

--

6

Repair the instrument panel cluster connector or replace the LH turn signal indicator bulb.

Is the repair complete?

--

Go to Exterior Lights Diagnostic System Check

--