GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Inspect the other instrumentation lights.

Are any other instrumentation lights off?

--

Diagnostic System Check - Vehicle

Go to Step 2

2

  1. Remove the controller
  2. Inspect the voltage between terminals A3 and A4 of the controller connector.

Is the voltage within the specified value?

11-14 V

Go to Step 4

Go to Step 3

3

Repair the wiring harness between the splice S204 and controller connector terminal A4 or between splice S204 and controller connector terminal A3.

Is the repair complete?

--

System OK

--

4

Inspect the illumination lamps.

Are any illumination lamps burned out?

--

Go to Step 5

System OK

5

Replace the burned out illumination lamp.

Is the repair complete?

--

System OK

--