GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Ensure that the battery is charged.
  2. Disconnect CKT 5 (BRN) at the generator.
  3. Connect a fused wire between generator harness connector terminal L and chassis ground.
  4. Place the ignition switch in the RUN position.

Does the battery indicator light?

--

Go to Step 2

Go to Step 5

2

Inspect the generator mechanical grounding.

Are the grounding connections in need of repair?

--

Go to Step 3

Go to Step 4

3

Repair the grounding connections.

Does the BAT indicator lamp still not light with the ignition switch in the RUN position and the engine stopped?

--

Go to Step 4

System OK

4

Replace the generator. Refer to Generator Replacement .

Does the BAT indicator lamp still not light with the ignition switch in the RUN position and the engine stopped?

--

Go to Step 5

System OK

5

  1. Ensure that the jumper is still connected.
  2. Disconnect the C1 IP harness connector at the instrument cluster.
  3. Connect a test lamp from CKT 6 (BRN) at instrument cluster connector C1 terminal 1 to chassis ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 6

6

Locate and repair the open in CKT 6 (BRN) between the instrument cluster and the generator.

Does the BAT indicator lamp still not light with the ignition switch in the RUN position and the engine stopped?

--

Go to Step 7

System OK

7

Connect a test lamp from CKT 1 (BRN) at instrument cluster connector C1 terminal 6 to chassis ground.

Does the test lamp light?

--

Go to Step 9

Go to Step 8

8

Locate and repair the open in CKT 1 (BRN) between the instrument cluster and S243.

Does the BAT indicator lamp still not light with the ignition switch in the RUN position and the engine stopped?

--

Go to Step 9

System OK

9

Inspect for an open filament in the BAT indicator lamp.

Is the filament good?

--

Go to Step 11

Go to Step 10

10

Replace the BAT indicator lamp.

Does the BAT indicator lamp still not light with the ignition switch in the RUN position and the engine stopped?

--

--

System OK

11

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Does the BAT indicator lamp still not light with the ignition switch in the RUN position and the engine stopped?

--

--

System OK