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

Did you perform the Lighting System Diagnostic Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn the headlamp switch to the HEAD position.
2. Place the headlamp dimmer switch in the LOW position.
3. Place the headlamp dimmer switch in the HIGH position.

Do the all headlamps operate properly?

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

Go to Step 3

Are all the high beam and low beam headlamps inoperative?

Go to Step 4

Go to Step 7

1. Disconnect the headlamp switch.
2. Using a test lamp, probe between the headlamp switch harness connector battery positive voltage circuit and a good ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 11

At the harness connector of the headlamp switch, install a jumper between the battery positive voltage circuit and the headlamp switch signal circuit.

Do the headlamps turn on?

Go to Step 10

Go to Step 6

Test for a open or a high resistance in the headlamp switched signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 9

Test for a open or high resistance in the ground circuit of the inoperative headlamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 8

Inspect for a poor connection at the harness connector of the inoperative headlamp. 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 15

Go to Step 12

Inspect for a poor connection at the harness connector of the headlamp dimmer switch. 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 15

Go to Step 13

Inspect for a poor connection at the harness connector of the headlamp switch. 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 15

Go to Step 14

Repair a open or an high resistance in the headlamp battery positive voltage supply circuit.

Did you complete the repair?

Go to Step 15

--

Replace the inoperative headlamp. Refer to Headlamp Assembly or Headlamp Bulb Replacement .

Did you complete the replacement?

Go to Step 15

--

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 15

--

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Did you complete the replacement?

Go to Step 15

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2