Power Door Locks Inoperative (Rear Door(s))
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Power Door Locks Inoperative (Rear Door(s))
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views or Body Control System Connector End Views in Body Control System |
|||
| 1 | Did you perform the Door Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Door Systems |
| 2 | Activate the door lock switches to the lock and unlock positions. Do both rear passenger doors lock and unlock? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Is there only one door lock actuator that is inoperative? | Go to Step 6 | Go to Step 4 |
| 4 | Are the rear door lock actuators inoperative for both lock and unlock? | Go to Step 8 | Go to Step 5 |
| 5 | Do the rear door lock actuators lock? | Go to Step 15 | Go to Step 10 |
| 6 |
|
Go to Step 7 | Go to Step 25 |
| 7 |
|
Go to Step 24 | Go to Step 26 |
| 8 |
|
Go to Step 21 | Go to Step 9 |
| 9 |
|
Go to Step 20 | Go to Step 22 |
| 10 |
|
Go to Step 11 | Go to Step 22 |
| 11 | With the test lamp connected to a good ground, probe the lock relay control circuit cavity in the fuse block. Does the test lamp illuminate? |
Go to Step 22 | Go to Step 12 |
| 12 |
|
Go to Step 13 | Go to Step 23 |
| 13 | With the test lamp connected to battery positive voltage, probe the door lock actuator lock control circuit cavity in the rear fuse block. Does the test lamp illuminate? |
Go to Step 20 | Go to Step 14 |
| 14 |
|
Go to Step 21 | Go to Step 22 |
| 15 |
|
Go to Step 16 | Go to Step 22 |
| 16 | With the test lamp connected to a good ground, probe the unlock relay control circuit cavity in the fuse block. Does the test lamp illuminate? |
Go to Step 22 | Go to Step 17 |
| 17 |
|
Go to Step 18 | Go to Step 23 |
| 18 | With the test lamp connected to battery positive voltage, probe the door lock actuator unlock control circuit cavity in the rear fuse block. Does the test lamp illuminate? |
Go to Step 21 | Go to Step 19 |
| 19 |
|
Go to Step 20 | Go to Step 22 |
| 20 | Inspect for poor connections at the rear door lock relay. 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 32 | Go to Step 27 |
| 21 | Inspect for poor connections at the rear door unlock relay. 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 32 | Go to Step 28 |
| 22 | Inspect for poor connections at the rear fuse block. 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 32 | Go to Step 29 |
| 23 | Inspect for poor connections at the harness connector of the body control 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 32 | Go to Step 30 |
| 24 | Inspect for poor connections at the harness connector of the door lock actuator. 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 32 | Go to Step 31 |
| 25 | Repair the open the door lock actuator lock circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 32 | - |
| 26 | Repair the open in the door lock actuator unlock circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 32 | - |
| 27 | Replace the rear door lock relay. Did you complete the repair? |
Go to Step 32 | - |
| 28 | Replace the rear door unlock relay. Did you complete the repair? |
Go to Step 32 | - |
| 29 | Replace the rear fuse block. Refer to Rear Electrical Center or Junction Block Replacement
. Did you complete the repair? |
Go to Step 32 | - |
| 30 | Replace the BCM. Refer to Body Control Module Replacement
in Body Control System. Did you complete the repair? |
Go to Step 32 | - |
| 31 | Replace the appropriate rear door lock actuator. Refer to Lock Actuator Replacement - Rear Door . Did you complete the repair? |
Go to Step 32 | - |
| 32 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |