I have S 430 2002. Just after few minutes the car alarm is on or lock the car, the driver side light keeps blinking

This is most likely your "Valet" alarm disable switch. Use to disable your car alarm so you can keep your Alarm Fob and let a Valet, mechanic, friend etc. operate the car without the alarm being functional. If it is an after market alarm, consult the mfg's manual, if OEM contact dealer for operating instructions.

the valet key doesnt have a transponder chip in it, so it will allow physical turning of keyways and operations, but will not disable the alarm and often wont disable the immobilizer.

sorry to say i think you will need to get an autolocksmith , or main dealer to get you a functioning key with transponder chip mapped to your cars rfid system that will allow alarm to be enabled /disabled

It can be any of the car doors not got properly locked or the door is locked but the switch is not sensing the door locked. Open and close each door again properly.

Or else its problem with any of switch wiring getting in contact with alarm wiring causing it to happen.

And last thing alarm connections need to be inspected. It's getting short somewhere in between.

There are few help links with solutions, to troubleshoot these types of problems. I suggest going through these links.

Click the link below: ------

Volvo car alarm keeps going off for no reason

http://technoanswers.blogspot.in/2012/07/volvo-car-alarm-keeps-going-off-for-no.html

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Alarm keeps going OFF

http://technoanswers.blogspot.in/2012/07/alarm-keeps-going-off.html

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2009 Toyota Camry: Hood Switch causing Alarm to go OFF?

http://whatisbyme.blogspot.in/2012/04/2009-toyota-camry-hood-switch-causing.html

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Ford Pickup Alarm will not disengage?

http://technoanswers.blogspot.com/2012/01/ford-pickup-alarm-will-not-disengage.html

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Mitsubishi Diamante: Factory Security Alarm will not go Off

http://www.howtorepairguide.com/2012/11/mitsubishi-diamante-factory-security.html

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Toyota Avalon Factory Alarm will go off?

http://repairhelpcenter.blogspot.com/2012/01/toyota-avalon-factory-alarm-will-go-off.html

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Chevrolet Tahoe Hood open warning on dash and alarm sounds?

http://schematicsdiagram.blogspot.com/2011/12/chevrolet-tahoe-hood-open-warning-on.html

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These details will help.

Thanks.

have you checked the fuzes ?

Sounds like a bad door switch on one of the four doors. The switches have multiple contacts to serve both the dome light and the alarm system. The actual switch button is under a rubber boot with ribbed sides. The switches themselves are under the interior trim behind the doors.

red light? this is a factory alarm?? Is GM on the key fob? factory alarms dont have "motion sensors" and very few aftermarket alarms do. roll down the window and set the alarm, now open the door and see if it lights off.

First, check that you're child safety lock isn't set for that door...If thats not possible then the next culprit might be the alarm FOB battery. IF, its an aftermarket alarm FOB you're in luck...changing the batt should do it...If it IS a factory alarm FOB, you have TWO choices...get a new aftermarket keyless entry system $89-129...or go to the dealer for reprogramming the remote, about $89.
Good Luck

this is the factory alarm indicator light. try locking the doors while your in the car and wait a few minutes. Unlock the door and open it and the horn should start to beep. Put your key in the driver's door and turn twice to unlock all the doors and stop the alarm.

not likely a fuse if other door lock works. the little red blinking light comes on when factory alarm sets and alarm isn't setting because the drivers side door latch is not working properly and alarm thinks the door is still open because of micro switch in latch not tripping.

the passenger side door lock will work to turn off alarm i'm having the same problem my car wont start cause the alarm is on and both of my door locks are broke so i'm trying to disable the alarm.