Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics

Did you perform the Lighting System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn the ignition to the OFF position.
2. Turn the headlamp switch to the HEAD position.
3. Place the headlamp switch in the high beam position.

Are the high beam headlamps operating properly?

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

Go to Step 3

Is only one high beam headlamp inoperative?

Go to Step 7

Go to Step 4

Place the headlamp switch in the flash to pass position.

Do the high beam headlamps operate in the flash to pass position?

Go to Step 13

Go to Step 5

Using a test lamp connected to a battery postive voltage, backprobe the headlamp switch high beam signal circuit that suplies the underhood fuse block.

Does the test lamp illuminate?

Go to Step 12

Go to Step 6

Test for a poor connection or an open in the high beam signal circuit of the headlamp switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 13

1. Disconnect the inoperative headlamp.
2. Using a test lamp connected to a known good ground, probe the battery positive voltage circuit of the inoperative high beam headlamp .

Does the test lamp illuminate?

Go to Step 8

Go to Step 10

Using a test lamp connected to a battery postive voltage, probe the high beam signal circuit of the inoperative high beam headlamp .

Does the test lamp illuminate?

Go to Step 11

Go to Step 9

Test for a poor connection or an open in the high beam signal circuit of the inoperative high beam headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 12

Repair a poor connection or an open in the battery positive voltage circuit of the inoperative headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Has the repair been made?

Go to Step 14

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Replace the inoperative headlamp. Refer to Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement .

Did you complete the repair?

Go to Step 14

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Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems.

Did you complete the repair?

Go to Step 14

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Replace the headlamp switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column.

Did you complete the repair?

Go to Step 14

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2