GM Service Manual Online
For 1990-2009 cars only

Charge Indicator Always On LG4 Engine

Step

Action

Value(s)

Yes

No

1

  1. Stop the engine.
  2. Disconnect CKT 5 (BRN) to the generator.

Does the BAT indicator lamp remain illuminated?

--

Go to Step 3

Go to Step 2

2

Replace the generator. Refer to Generator Replacement .

Does the BAT indicator lamp remain illuminated with the engine running?

--

Go to Step 3

System OK

3

  1. Disconnect the connector at the instrument cluster.
  2. Connect a J39200 between generator connector terminal A1 and chassis ground.

Does the DMM indicate continuity?

--

Go to Step 4

Go to Step 5

4

Locate and repair the short to ground in the BRN wire between the instrument cluster and the generator.

Does the BAT indicator lamp remain illuminated with the engine running?

--

--

System OK

5

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Does the BAT indicator lamp remain illuminated with the engine running?

--

--

System OK