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

Did you review the headlamps operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

1. Place the headlamp switch in the HEADLAMP position.
2. Place the headlamp dimmer switch in the LOW position.
3. Place the headlamp dimmer switch in the HIGH position.

Do the appropriate headlamps illuminate in both headlamp dimmer switch positions?

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

Go to Step 3

1. Disconnect the lighting high low relay.
2. Probe the switch side output circuit of the lighting high low relay with a test lamp that is connected to battery positive voltage.

Does the test lamp illuminate?

Go to Step 4

Go to Step 5

Inspect for poor connections at the lighting high low relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 7

Go to Step 6

Repair an open or high resistance in the switch side output circuit of the lighting relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 7

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Replace the lighting high low relay.

Did you complete the replacement?

Go to Step 7

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3