Location of Master Switch for central locking

If the door lock master switch is on the driver's door panel, most common issue is either a bad switch, or broken wiring in the door hinge area where it flexes.

Central junction box fuse # 18 an it is 15amp !
Central Junction Box Behind LH side of I/P If the fuse is good there are three relays , all unlock relay an all lock relay an driver door relay in the . relay box !
Relay Box
Behind I/P, right of steering column Visual Inspection Chart Mechanical Electrical

• Power door lock actuators
• Power door lock switches

• Fuse junction panel fuse 18 (15A)
• Circuitry
• Damaged or corroded connectors
• Faulty or sticking relays

None of the doors lock or unlock ?

starter/igniton switch faulty to diable the door locks: switch on but do not start the engine, press the unlock button on the driver door three times, switch off, press the unlcok buttons three times more, switch on without starting press unlock and lock again and switch off.

This is because your master switch on the drivers door may have corroded oxidation on the contacts inside the switch and that master switch is the feed for all inside door lock switches your remote and keypad work because those electrical signals go through the driver door module you must clean all contacts on the master switch get them shiny you can use 4/0 steel wool and alcohol and also take the lock switch apart and clean the button contacts inside the switch for this use alcohol and 1000 grit sandpaper glued to a pencil and lightly spin in your fingers to shine the contacts sometimes just an eraser works but it depends on the quality of it so go with the sandpaper glued to the pencil or any circular object that will fit inside after this blow out the switch and use the alcohol to clean out and let dry

The air powered centrol locking is a pain, not the least because of the high cost of a replacement circuit board.

I can't quite remember how I overcame the problem. I think I applied either pressure or suction to the air pipe to unlock everything and then once everything was unlocked I was able to manually lock and unlock each door and in this case the boot lid. The fuel flap was left unlocked without problems.

You need to the BCM (body control module) scanned, it may be defective.

Inside the truck behind the trim is a manual release for the gas door, the release looks like the head of a large key on a small wire string. It is marked.

Battery Constant 12v+ Positive Wire (+): Black/Yellow
Battery Constant 12v+ Positive Wire Location: Ignition Switch Harness

Starter Positive Wire (+): Blue/Red
Starter Positive Wire Location: Ignition Switch Harness

Ignition Positive Wire (+): Red
Ignition Positive Wire Location: Ignition Switch Harness

Accessory Positive Wire (+): Red/Yellow
Accessory Positive Wire Location: Ignition Switch Harness

Parking Light Positive Wire (+): Red
Parking Light Positive Wire Location: Low In Drivers Kick Panel

Power Door Lock Negative Wire (-): Add Actuator. This vehicle uses a central door locking system. When connecting a keyless entry, you will need to add a door lock actuator and some units will also require (2) extra relays.
Power Door Lock Negative Wire Location: To Drivers Door Only

Power Door Unlock Negative Wire (-): Add Actuator. This vehicle uses a central door locking system. When connecting a keyless entry, you will need to add a door lock actuator and some units will also require (2) extra relays.
Power Door Unlock Negative Wire Location: To Drivers Door Only

Door Trigger Negative Wire (-): Red/White
Door Trigger Negative Wire Location: In Black Plug, Above Hood Release

Domelight Supervision Wire: Use Door Trigger, Requires Relay
Domelight Supervision Wire Location: N/A

Horn Negative Wire (-): Red/Green
Horn Negative Wire Location: At Steering Column Harness

Tachometer Wire Negative Wire (-): Black/Blue
Tachometer Wire Negative Wire Location: At ECM, Under Drivers Side Dash

Brake Light Positive Wire (+): White/Black
Brake Light Positive Wire Location: At Switch Above Brake Pedal

CODE ALARM SYSTEM

Used on:
Impreza 1996-2001
Legacy 1995-1999
Forester 1998-2000

Battery GP-23A

Lock: Left button will lock all doors. Double chirp indicates locked.
Unlock: Right button will unlock driver's door only. Hold unlock button app 6 seconds, it will unlock all doors including rear gate. Single chirp indicated unlock.
If the car chirps or lights flash 4x the alarm was triggered.
Panic. Press both buttons to activate emergency honk and flashing lights.
Valet mode: With optional alarm onlyPress the red alarm button on the left of the steering wheel. The light will quickly double flash. To re-set back to normal mode, press the red alarm light button again

Battery failed and lights flashing?
Parking lights will flash when the vehicle's battery is disconnected and reconnected.
To stop lights from flashing, either:
Press remote transmitter "UNLOCK" button once OR turn the ignition switch to the "ON" position and press programming button for one second (see below).
The vehicle interior (courtesy) light and door open warning light (DOOR AJAR indicator) will then illuminate for 60 seconds when the ignition is turned off, or until the doors are locked with the remote transmitter. Yes, the dashboard instrument panel lights will flash when the parking lights flash.

Programming or Overriding the Alarm when you have lost the remote
Open driver's door.
Turn ignition key to 'On'
Press and *hold programming button* in (see diagram, button under dashboard)
After 15 seconds the the door locks will cycle 3 times. Do not release Programming button.
Press lock (left) button the remotes to be programmed. The door locks will cycle one time. Exit programming mode by releasing Programming button under dashboard and turning key to off.

Code Alarm Programming Button is under dashboard on the kick panel by the driver's left knee, left of the steering column. If you can't find it, it might still be tucked up in the wiring harness higher up in that same general area. The botton is recessed in a plastic ring (see diagram).
This button must be pressed while programming remotes or if the battery was disconnected and the lights are flashing.

Was the car battery disconnected before this central locking problem.Also is the central locking system operated by remote.If yes,then is the remote battery new or old.If the battery in remote is old then try with new battery.Also if the central locking is controlled by a push button in the car then it can be the problem with push button switch .The switch on driver side is got short.It has to be checked with meter to confirm the fault.Apply a direct 12 volt external battery to the switch and check if the central locking is getting done.Also confirm if you can lock the doors manually by using a car key.If you are not able to lock the door with key manually then its faulty door latch.But if the door lock and unlock manually with out any problem then this problem is related to central locking switch or the remote.

A switch opens the door when you use the central locking system. If the door fails to open or close, this switch has probably gotten detached or the locking mechanism is damaged.
To find the problem and fix it-pull apart the door panel and feel for a thin rod connected to the locking mechanism.
This will help you pinpoint the issue and then fix it.