Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views

Did you review the Exterior Lighting Systems Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Exterior Lighting Systems Description and Operation

Verify that the stop lamps are always on.

Do the stop lamps operate normally?

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

Go to Step 3

Disconnect the stop lamp switch.

Do the stop lamps remain illuminated?

Go to Step 4

Go to Step 7

Disconnect the multifunction turn signal switch and the high mount stop lamp (CHMSL) relay (pickup only) and test for a short to voltage in the following circuits. Refer to Circuit Testing in Wiring Systems:

Was a problem found?

Go to Step 6

Go to Step 5

1. Test the CHMSL relay (pickup only) for shorted internal contacts and replace as necessary. Refer to Relay Replacement in Wiring Systems.
2. If the vehicle is not equipped with CHMSL relay or a relay fault is not found, replace the multifunction switch turn signal switch. Refer to Turn Signal Multifunction Switch Replacement Steering Wheel and Column.

Did you complete the repair?

Go to Step 8

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Repair the short to voltage in one of the following circuits. Refer to Wiring Repairs in Wiring Systems:

Did you complete the repair?

Go to Step 8

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

Did you complete the repair?

Go to Step 8

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3