Central locking My Sierra Sapphire central locking is continuously locking as soon as I unlock the doors.Even with the doors open the cycle continues until I shut the doors when it locks itself.I suspect dampness may have got in as the front passenger loudspeaker has also stopped working after the car has stood outside for most of this wet winter.Checked fuse etc.Any ideas

Does it have keyless entry ?
Power Door Locks
The central security module controls the power door lock and keyless entry system. The lock and unlock operation is carried out by supplying ground to the central security module from the door lock control switch. The normal path of the actuators is to ground through the central security module. The door lock control switch will lock and unlock all doors by grounding the appropriate circuit to the central security module. The central security module then supplies power to the appropriate common actuator circuit to lock or unlock all doors.

Keyless Entry
The keyless entry remote transmitter sends a frequency that is received by the central security module internal antenna. Depending on the frequency received, the central security module will lock all doors or unlock the driver door. If the unlock frequency is received again within five seconds of the first unlock, the central security module will unlock all doors.
If the frequency received is from the panic button, the central security module will cycle ground to the parking lamps and horn. The parking lamps and horn will continue to cycle until the panic button is pressed again or the ignition switch is turned to the RUN position.

probably a door switch problem will it lock unlock from pass. door

You can't figure out thing's without knowing how there work , what controls them . In this case a control module .
Principles of Operation

Power Door Locks
The central security module controls the power door lock and keyless entry system. The lock and unlock operation is carried out by supplying ground to the central security module from the door lock control switch. The normal path of the actuators is to ground through the central security module. The door lock control switch will lock and unlock all doors by grounding the appropriate circuit to the central security module. The central security module then supplies power to the appropriate common actuator circuit to lock or unlock all doors.
Plus we don't guess , we test the electrical circuits with a DVOM - digital multimeter or a test light . We use a wiring diagram so we know which part of the circuits to test .

Keyless Entry
The remote transmitter sends a frequency that is received by the central security module internal antenna. Depending on the frequency received, the central security module will lock all doors or unlock the driver door. If the unlock frequency is received again within five seconds of the first unlock, the central security module will unlock all doors.
If the frequency received is for the panic button, the central security module will cycle ground to the park lamp and horn. The park lamps and horn will continue to cycle until the panic button is pressed again or the ignition switch is turned to the RUN position or 2.75 minutes elapse.
Plus we hook up a scan tool that can read codes from the control module , not a code reader for engine codes , won't work ! Need a professional scan tool .Do you know what DTC'S are ? Diagnostic trouble codes !
Central Security Module Diagnostic Trouble Code (DTC) Index DTC Description Source Action to Take B1309 Power Door Lock Circuit Short to Ground Central Security Module Go To Pinpoint Test C . B1341 Power Door Unlock Circuit Short to Ground Central Security Module Go To Pinpoint Test C . B1485 Brake Pedal Input Circuit Short to Battery Central Security Module Go To Pinpoint Test E . B1526 Keyless Entry Circuit Short to Ground Central Security Module Go To Pinpoint Test F . B1629 PRNDL Reverse Input Short to Battery Central Security Module Go To Pinpoint Test E . B2276 Less Than Two Transmitters Programmed Central Security Module Go To Pinpoint Test I . B2425 Remote Keyless Entry Out of Synchronization Central Security Module Go To Pinpoint Test I . - All Other DTCs Central Security Module REFER to Section 419-10 .

• All door locks are inoperative

• Battery junction box (BJB) fuse(s):
  • 8 (15A).
  • 115 (20A) (Super Crew).
• Circuitry.
• Central security module.

• Go To Pinpoint Test C .

Seams you lack the knowledge and test equipment to tackle this type of repair . Your best bet mite be to have a qualified repair shop check it out.
So, without testing i couldn't even begin to suggest what mite be wrong . I would only be guessing , as would anyone on here would.

I have seen this and it was caused by a defective switch on the door.

Here is the way to do it.
1. Close all doors
2. Insert key into ignition
3. Hold down the power UNLOCK button on the driver's door panel, continue to hold down
until instructed to release in step 9.
4. Perform steps 5 through 8 in a fairly rapid succession.
5. Turn the ignition to the ON position (as far as you can go without starting the engine.)
6. Turn the ignition to the OFF position.
7. Turn the ignition to the ON position (as far as you can go without starting the engine.)
8. Turn the ignition to the OFF position.
9. Release the power UNLOCK button on the door panel. The vehicle should respond by
door locks locking and unlocking automatically. (If locks do not cycle after you let go,
not before you let go of the unlock button, then the vehicle has not entered programming
mode and you must start procedure over. Remove key from ignition, open drivers door
and return to step 1 ). If the locks do cycle automatically then proceed to step 10.
10. Hold down the LOCK and UNLOCK buttons on the remote until the doors lock and
unlock. This may take up to 30 seconds.
11. Repeat step 10 NOW for each additional remote. (Including any existing remotes).
12. Turn the ignition to the ON position to exit the programming mode.
13. Test remote(s).

Hi, please try reprogramming the fob using these procedures, and thankd for using FixYa:
Close all doors
2. Insert key into ignition
3. Hold down the power UNLOCK button on the driver's door panel, continue to hold down
until instructed to release in step 9.
4. Perform steps 5 through 8 in a fairly rapid succession.
5. Turn the ignition to the ON position (as far as you can go without starting the engine.)
6. Turn the ignition to the OFF position.
7. Turn the ignition to the ON position (as far as you can go without starting the engine.)
8. Turn the ignition to the OFF position.
9. Release the power UNLOCK button on the door panel. The vehicle should respond by
door locks locking and unlocking automatically. (If locks do not cycle after you let go,
not before you let go of the unlock button, then the vehicle has not entered programming
mode and you must start procedure over. Remove key from ignition, open drivers door
and return to step 1 ). If the locks do cycle automatically then proceed to step 10.
10. Hold down the LOCK and UNLOCK buttons on the remote until the doors lock and
unlock. This may take up to 30 seconds.
11. Repeat step 10 NOW for each additional remote. (Including any existing remotes).
12. Turn the ignition to the ON position to exit the programming mode.
13. Test remote(s).

Hi:
It is extremely difficult to remove the door panel with the door closed. You mentioned that you can unlock the door with a key, so does the door still open and close once unlocked? You most likely just need to replace the power door lock solenoid, as when they fail, they usually sieze up, and make manual lock unlocking difficult.

The relay is working fine if the automatic locking system is working. The module for the automatic door locks has a circuit to lock the doors upon shifting the vehicle to drive. The circuitry has a relay built into it that unlocks the doors when parked so that module is not fuctioning properly for the unlocking mode

1. Close all doors
2. Insert key into ignition
3. Hold down the power UNLOCK button on the driver's door panel, continue to hold down
until instructed to release in step 9.
4. Perform steps 5 through 8 in a fairly rapid succession.
5. Turn the ignition to the ON position (as far as you can go without starting the engine.)
6. Turn the ignition to the OFF position.
7. Turn the ignition to the ON position (as far as you can go without starting the engine.)
8. Turn the ignition to the OFF position.
9. Release the power UNLOCK button on the door panel. The vehicle should respond by
door locks locking and unlocking automatically. (If locks do not cycle after you let go,
not before you let go of the unlock button, then the vehicle has not entered programming
mode and you must start procedure over. Remove key from ignition, open drivers door
and return to step 1 ). If the locks do cycle automatically then proceed to step 10.
10. Hold down the LOCK and UNLOCK buttons on the remote until the doors lock and
unlock. This may take up to 30 seconds.
11. Repeat step 10 NOW for each additional remote. (Including any existing remotes).
12. Turn the ignition to the ON position to exit the programming mode.
13. Test remote(s).

Resolving this problem will require removing the door panel in question, and checking for voltage at the solenoid when the unlock button is pressed.
If there is 12V at the positive wire to the solenoid, but the door does not attempt to unlock, you must replace the solenoid.
Doors are not fused individually, so the fact the other doors are operating properly rules out fuses.
Remove the door panel, and check for voltage - if there is no voltage, the wiring is suspect. This would require more in-depth troubleshooting - checking wires for continuity to ground, and overall continuity.
Start with the door. Re-post your findings and I can help you additionally.

Thanks for using FixYa - Your FiXyA rating is appreciated!!