GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you review the Exterior Lighting Systems Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

2

Verify that the High Beam Indicator is inoperative.

Does the Indicator operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Using a test lamp backprobe connector C1, cavity 6 of the instrument panel cluster assembly to ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 9

4

Using a fused jumper wire, backprobe connector C1, cavity 4 of the instrument panel cluster assembly to ground.

Does the high beam indicator lamp light?

Go to Step 6

Go to Step 5

5

Test for an open in the IP cluster printed circuit .

Does an open condition exist?

Go to Step 8

Go to Step 7

6

Repair the open high beam ground circuit between connector C1, cavity 4 of the instrument panel cluster assembly and S234. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 10

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7

Replace the high beam indicator lamp.

Did you complete the repair?

Go to Step 10

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8

Replace IP cluster printed circuit. Refer to Printed Instrument Cluster Circuit Replacement .

Did you complete the repair?

Go to Step 10

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9

Repair the open LH headlamp supply voltage circuit between connector C1, cavity 6 of the instrument panel cluster assembly and S235. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 10

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10

Operate the system in order to verify the repair.

Did you correct the concern?

System OK

Go to Step 3