For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Power Distribution Schematics Connector End View Reference: Master Electrical Component List
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 | Do only the devices powered by the accessory relay exhibit this symptom? | Go to Step 4 | Go to Step 3
3 |

1. Install a scan tool. Select body control module (BCM) data in data display.
2. Close all the doors.
3. Turn ON the ignition, with the engine OFF.
4. Wait 5 seconds, then turn the ignition OFF.
5. Wait for the retained accessory power (RAP) time-out.

Does the scan tool display the Accessory power mode, then time-out, and display Off-Awake or OFF power mode?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 10

4 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the accessory relay.

Do the devices controlled by the Accessory relay operate?

Go to Step 5

Go to Step 6

5 | Repair the short to battery in the accessory relay switched output circuit. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 12 | --
6 |

1. Open the driver door.
2. Connect a test lamp across the relay coil circuits of the Accessory relay socket.

Does the test lamp illuminate?

Go to Step 7

Go to Step 8

7 | Test the accessory relay control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 10
8 | Inspect for poor connections at the accessory relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 9
9 | Replace the accessory relay. Did you complete the replacement? | Go to Step 12 | --
10 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 11
11 | Important: Perform the module setup procedure, if required. Replace the BCM. Refer to Body Control Module Replacement . Did you complete the procedure? | Go to Step 12 | --
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2