GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Did you perform the Interior Lights System Check?

--

Go to Step 2

Go to Interior Lamps System Check

2

  1. Open the left front door.
  2. Backprobe the diode module using a test light from cavity F to B+.

Does the test lamp light?

--

Go to Step 3

Go to Step 5

3

Inspect for an open in the BLK/RED wire between S250 and the diode module.

Is the connection OK?

--

Go to Step 4

Go to Step 7

4

Replace the diode module. Refer to Diode Module Replacement for the 1.0L engine or Diode Module Replacement to for the 1.3L engine in Engine Controls.

Is the repair complete?

--

Go to Interior Lamps System Check

--

5

Inspect for an open in the BLK/BLU wire between the diode module and the left front door jamb switch.

Is the connection OK?

--

Go to Step 6

Go to Step 7

6

Replace the left front door jamb switch. Refer to Front Side Door Jamb Switch Replacement for 2-Door or to Front Side Door Jamb Switch Replacement for the 4-Door.

Is the repair complete?

--

Go to Interior Lamps System Check

--

7

Repair the open connection. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lamps System Check

--