GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Park Avenue 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 Backup Lamps Inoperative

Step

Action

Value(s)

Yes

No

1

Did you perform the Lighting System Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With the scan tool, command the Perimeter Lamp relay ON and OFF.

Did the backup lamps turn ON and OFF with each command?

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Go to Step 10

Go to Step 3

3
  1. Turn OFF the ignition.
  2. Disconnect the Perim LP relay.
  3. Connect a test light between the coil side feed circuit of the Perim LP Relay and a good ground.
  4. Turn ON the ignition, with the engine OFF.

Does the test light illuminate?

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Go to Step 4

Go to Step 12

4

Connect a test light between the switch side feed circuit of the Perim LP Relay and a good ground.

Does the test light illuminate?

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Go to Step 5

Go to Step 13

5
  1. Connect a test light between the coil side feed circuit of the Perim LP Relay and the control circuit of the Perim LP relay.
  2. With a scan tool command the perimeter lamp output ON and OFF.

Did the test light turn ON and OFF with each command?

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Go to Step 6

Go to Step 9

6
  1. Turn OFF the ignition.
  2. Connect a fused jumper between the Perim LP relay switch side feed circuit and the Perim LP supply voltage circuit at the Perim LP relay connector.
  3. Turn ON the ignition, with the engine OFF.

Did the backup lamps illuminate?

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Go to Step 7

Go to Step 14

7

Inspect for poor connections at the Perim LP relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 16

Go to Step 7

8

Replace the Perim LP relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the replacement?

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Go to Step 16

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9

Test the perim LP relay control circuit for high resistance, a short to voltage, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 16

Go to Step 10

10

Inspect for poor connections at the remote function actuator (RFA) 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 16

Go to Step 11

11

Replace the RFA module. Refer to RFA Module Replacement in Keyless Entry.

Did you complete the replacement?

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Go to Step 16

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12

Repair the open or high resistance in the perim LP relay coil side feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 16

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13

Repair the open or high resistance in the perim LP relay switch side feed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 16

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14

Test the Perim LP relay switch side load circuit for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

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Go to Step 16

Go to Step 15

15

Repair the open or high resistance in the back up lamp ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 16

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16

Operate the system in order to verify the repair.

Did you find and correct the condition?

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System OK

Go to Step 2