GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Interior Lamps System Check performed?

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Go to Step 2

Go to Interior Lamps System Check

2

  1. Disconnect the connector at the headlamp switch.
  2. Connect an unpowered test lamp between the headlamp switch connector, cavity H for CKT 240 (ORN), and ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 3

3

Repair the open in CKT 240 (BRN) between the instrument panel fuse block and the headlamp switch.

Are all of the lamps operative?

--

Go to Interior Lamps System Check

Go to Step 4

4

  1. Connect a J 39200 DMM between pin H and pin S of the headlamp switch.
  2. Place the headlamp switch in the park lamps position.

Is continuity present?

--

Go to Step 5

Go to Step 6

5

Repair the open in CKT 9 (BRN) between the headlamp switch and splice S225.

Are all of the lamps operative?

--

Go to Interior Lamps System Check

Go to Step 6

6

Replace the headlamp switch.

Are all of the lamps operative?

--

Go to Interior Lamps System Check

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