Did you perform the Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

Perform the Theft Deterrent Outputs Test. Refer to On-Board Diagnostic Features in Body Control System.

Do the exterior lamps flash when enabled?

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

Go to Step 3

1. Remove the theft deterrent relay.
2. Connect a test lamp between the theft deterrent relay coil battery voltage circuit and ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 11

1. Connect a test lamp between the theft deterrent relay coil battery voltage circuit and the relay control circuit.
2. While observing the test lamp, press the lock button on the remote control door lock transmitter.

Does the test lamp illuminate?

Go to Step 5

Go to Step 12

Connect a test lamp between the theft deterrent relay switched side battery positive voltage circuit and ground.

Does the test lamp illuminate?

Go to Step 6

Go to Step 9

1. Connect a test lamp between the theft deterrent relay connector switched side battery positive voltage circuit and ground.
2. Turn on the park lamps.

Does the test lamp illuminate?

Go to Step 7

Go to Step 10

Test for and repair a poor connection at the theft deterrent relay connector park lamps supply voltage circuit. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and repair a poor connection?

Go to Step 16

Go to Step 8

Replace the theft deterrent relay. Refer to Theft Deterrent Relay Replacement .

Did you complete the replacement?

Go to Step 16

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Repair the open in the battery voltage circuit of the theft deterrent relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Repair the open in the park lamps supply circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Repair the open in the battery voltage circuit of the theft deterrent relay coil. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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1. Connect the test lamp between the theft deterrent relay coil battery voltage circuit and the body control module (BCM) connector reley coil control circuit.
2. While observing the test lamp, press the lock button on the remote control door lock transmitter.

Does the test lamp illuminate?

Go to Step 13

Go to Step 14

Repair the open in the theft deterrent relay control circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

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Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and repair a poor connection?

Go to Step 16

Go to Step 15

Important: When replacing the BCM, perform the relearn procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

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