Hi, I have 1995 toyota camry that has automatic power doors & locks. Suddenly, this evening the complete power doors & locks stopped working. So this means i can't unlock all the doors automatically and also all the windows cannot be opened. What could be the possible causes of the problem? what kind of repair shops (like tires plus/firestone/midas) fix this problem?

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It can be issue with keyfob or door locking mechanism.

Check the help link mentioned below:---

How to test Power door locks?

http://repairhelpcenter.blogspot.in/2012/02/how-to-test-power-door-locks.html

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2006 Toyota Camry: Power Door Locks Not Working?

http://whatisbyme.blogspot.in/2012/05/2006-toyota-camry-power-door-locks-not.html

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Door locks or windows not working on car?
http://schematicsdiagram.blogspot.com/2011/07/door-locks-or-windows-not-working-on.html

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All power door locks not working on Honda Accord?
http://howtobyme.blogspot.com/2011/11/all-power-door-locks-not-working-on_14.html

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Repairing car Door lock Actuator?
http://howtobyme.blogspot.com/2011/11/repairing-car-door-lock-actuator.html

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How to Access car door panel?
http://howtobyme.blogspot.com/2011/11/how-to-access-car-door-panel.html
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Vehicle door panel components?
http://howtobyme.blogspot.com/2011/11/vehicle-door-panel-components.html

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Power door locks not working?

http://schematicsdiagram.blogspot.com/2011/12/power-door-locks-not-working.html

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Door locks not working on Ford Explorer?

http://technoanswers.blogspot.com/2012/01/door-locks-not-working-on-ford-explorer.html

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These details will help.
Thanks.

if you use the keyless entry to unlock the vehicle & don't open a door within 30 secs.the vehicle will automatically lock & the alarm will reset,if you unlock it with the key this shouldn't happen.....cheers.

Easy enough to do. You could identify the fuse that does this, or disconnect the wire from the speedometer, or pull and tape one of the solenoid wires in all of the doors. Depends on which is easiest.

u may have a broken wire between the door & the door jam,, or a relay that's not working,,u mite want to get a haynes repair book on your car it will help u

Please check the fuse in the fuse box. Replace the burnt fuse with exactly the same value fuse.

Bad ignition coil. Replace.

check for blown fuses and relays under dash, fuse box cover should have diagram that shows which fuse and relay does what.

if you can here relays when unlocking/locking check for power at door lock actuators inside doors, if you have power on lock/unlock and good earth from connector actuators are faulty.
if no power on test light when operating check output from central door lock module while operating, none coming out of module then it might need replacing.
check 30Amp power fuse for main relay under bonnet (which goes to pin 8 white/blue on module)and 10Amp gauge fuse in cab(pin 1 blue/red on module),pin 15 is also power when relay is on(red/blue) with test light, and module/ actuators.
check outputs from module pin 3 & 4
blue/red
blue/black
that go to door locks

There is no fuse. The circuit is controlled by a circuit breaker, and they never fail. What I would be looking for, from personal experience, would be a broken wire between the door and the body. The wires break inside the harness, right between the body and the door.