Schematic Reference: Exterior Lights Schematics

Did you review the exterior lighting description and operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

Place the hazard warning switch in the ON position.

Do the hazard lamps illuminate and flash?

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

Go to Step 3

1. Disconnect the hazard lamps flasher.
2. Probe the battery positive voltage circuit of the hazard lamps flasher with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 10

Connect the test lamp between the battery positive voltage circuit of the hazard lamps flasher and the ground circuit of the hazard lamps flasher.

Does the test lamp illuminate?

Go to Step 5

Go to Step 11

1. Connect a 20 amp fused jumper wire between the battery positive voltage circuit of the hazard lamps flasher and the hazard flasher signal circuit of the hazard warning switch.
2. Place the hazard warning switch in the ON position.

Do the hazard lamps illuminate?

Go to Step 8

Go to Step 6

1. Leave the fused jumper wire connected.
2. Disconnect the hazard warning switch.
3. Probe the hazard flasher signal circuit of the hazard warning switch with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 7

Go to Step 12

1. Leave the fused jumper wire connected.
2. Connect a 20 amp fused jumper wire between the hazard flasher signal circuit of the hazard warning switch and the left turn signal lamp supply voltage circuit of the hazard warning switch.

Does the left hazard lamp illuminate?

Go to Step 9

Go to Step 13

Inspect for poor connections at the hazard lamps flasher. 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 14

Inspect for poor connections at the harness connector of the hazard warning 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

Repair an open, high resistance, or short to ground in the battery positive voltage circuit of the hazard lamps flasher. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Repair an open or high resistance in the ground circuit of the hazard lamps flasher. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Repair an open, high resistance, or short to ground in the hazard flasher signal circuit of the hazard warning switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Repair an open or high resistance in the ground circuit of the hazard lamps. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Replace the hazard lamps flasher.

Did you complete the replacement?

Go to Step 16

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Replace the hazard warning switch. Refer to Hazard Warning Switch Replacement .

Did you complete the replacement?

Go to Step 16

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3