Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views

1

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Press and release the brake pedal.
2. Observe the stop lamps.

Do the stop lamps operate properly?

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

Go to Step 3

Operate the turn signal lamps.

Do the rear turn signal lamps operate properly?

Go to Step 4

Go to Turn Signal Lamps and/or Indicators Inoperative

Is only the center high mounted stop lamp (CHMSL) inoperative?

Go to Step 6

Go to Step 5

Is there only one inoperative stop lamp?

Go to Step 8

Go to Step 10

1. Disconnect the CHMSL.
2. Connect a test lamp between the stop lamp switch signal circuit of the CHMSL and a good ground.
3. Press and hold the brake pedal.

Does the test lamp illuminate?

Go to Step 7

Go to Step 19

Connect a test lamp between the stop lamp switch signal circuit of the CHMSL and the ground circuit of the CHMSL.

Does the test lamp illuminate?

Go to Step 16

Go to Step 20

1. Disconnect the inoperative stop lamp.
2. Connect a test lamp between the supply voltage circuit of the inoperative stop lamp and a good ground.
3. Press and hold the brake pedal.

Does the test lamp illuminate?

Go to Step 9

Go to Step 13

Connect a test lamp between the supply voltage circuit of the inoperative stop lamp and the ground circuit of the inoperative stop lamp.

Does the test lamp illuminate?

Go to Step 17

Go to Step 20

1. Disconnect the turn/hazard flasher module.
2. Connect a test lamp between the stop lamp switch signal circuit and a good ground.
3. Press and hold the brake pedal.

Does the test lamp illuminate?

Go to Step 14

Go to Step 11

1. Reconnect the turn/hazard flasher module.
2. Disconnect the stop lamp switch.
3. Connect a test lamp between the battery positive voltage circuit of the stop lamp switch and a good ground.

Does the test lamp illuminate?

Go to Step 12

Go to Step 18

Connect a 15 amp fused jumper between the battery positive voltage circuit of the stop lamp switch and the stop lamp switch signal circuit.

Do the stop lamps illuminate?

Go to Step 15

Go to Step 19

Test for an open or high resistance in the supply voltage circuit of the appropriate stop lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 26

Go to Step 14

Inspect for poor connections at the harness connector of the turn/hazard flasher module. 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 26

Go to Step 22

Inspect for poor connections at the harness connector of the stop lamp 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 26

Go to Step 23

Inspect for poor connections at the harness connector of the CHMSL. 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 26

Go to Step 24

Inspect for poor connections at the harness connector of the appropriate stop lamp. 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 26

Go to Step 25

Repair an open or high resistance in the battery positive voltage circuit of the stop lamp switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete repair?

Go to Step 26

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Repair an open or high resistance in the stop lamp switch signal circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete repair?

Go to Step 26

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Repair an open or high resistance in the ground circuit of the appropriate stop lamp. Refer to Wiring Repairs in Wiring Systems.

Did you complete repair?

Go to Step 26

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Repair an open or high resistance in the battery positive voltage circuit of the stop lamp switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete repair?

Go to Step 26

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Replace the turn/hazard flasher module. Refer to Hazard and Turn Signal Flasher Replacement .

Did you complete replacement?

Go to Step 26

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Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement .

Did you complete replacement?

Go to Step 26

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Replace the CHMSL. Refer to High Mount Stop Lamp Replacement .

Did you complete replacement?

Go to Step 26

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Replace the appropriate stop lamp. Refer to Tail Lamp Replacement .

Did you complete replacement?

Go to Step 26

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2