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. Ensure that the dome lamps OFF switch is in the retracted, or the lamps on position.
  2. Disconnect the connector at the left front door jamb switch.
  3. Ensure that the ignition switch is in the OFF position or the LOCK position.
  4. Connect an unpowered test lamp between the left front door jamb switch connector, cavity A for CKT 328 (PPL), and ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 3

3

Repair the open in CKT 328 (PPL) between splice S240 and the left front door jamb switch.

Do the dome lamps light when the left front door is open?

--

Go to Interior Lamps System Check

Go to Step 4

4

Connect a J 39200 DMM between the left front door jamb switch connector, cavity A for CKT 150 (BLK), and ground.

Is continuity present?

--

Go to Step 5

Go to Step 6

5

Replace the left front door jamb switch.

Do the dome lamps light when the left front door is open?

--

Go to Interior Lamps System Check

Go to Step 6

6

Repair the open in CKT 150 (BLK) between the left front door jamb switch and ground G201 or ground G200 (upfitter provisions).

Do the dome lamps light when the left front door is open?

--

Go to Interior Lamps System Check

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