Schematic Reference: Exterior Lights Schematics

Was the Lighting System Diagnostic System check performed?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn the ignition switch to the OFF position.
2. Turn the headlamp switch to the OFF position.

Are any of the headlamps on?

Go to Step 3

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

Disconnect the headlamp switch.

Are the headlamps on?

Go to Step 4

Go to Step 8

Disconnect the headlamp dimmer switch.

Are the headlamps on?

Go to Step  6

Go to Step 5

Test for a short to battery positive voltage in the headlamp switch signal circuit.

Did you find and correct the condition?

Go to Step 10

Go to Step 7

Test for a short to battery positive voltage in the headlamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 9

Replace the headlamp dimmer switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column.

Did you complete the replacement?

Go to Step 10

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Did you complete the replacement?

Go to Step 10

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

Did you complete the replacement?

Go to Step 10

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2