GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Headlights System Check?

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Go to Step 2

Go to Headlight System Check

2

  1. Disconnect the right high beam headlamp connector.
  2. Connect a DMM between the right high beam headlamp connector, cavity A (base), cavity B (quad) for CKT 250 (BLK), and ground.

Is there continuity?

--

Go to Step 3

Go Step 4

3

  1. Place the headlamp and panel dimmer switch in the headlamp position.
  2. Operate the headlamp dimmer switch in order to select the high beam position.
  3. Connect a test lamp between the right high beam headlamp connector, cavity B (base), cavity A (quad)for CKT 11 (LT GRN), and ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

Repair the open in CKT 250 (BLK) between the right high beam headlamp and G112. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Headlight System Check

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5

Replace the right high beam headlamp socket if the filament is not open.

Is the repair complete?

--

Go to Headlight System Check

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6

Repair the open in CKT 11 (LT GRN) between S121 and the right high beam headlamp. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Headlight System Check

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