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Car Alarms/Nissan sentra dead & alarm not working

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Question
Hi,

I'm looking after a friends car, it's a pretty old Nissan Sentra (about 15-18 years old I think).  The other day when I parked it it doubled beeped as I was getting out of the car.  Then when I tried to use the alarm to lock it it didn't respond so I locked it manually.  I assumed the battery in the remote was dying (it had been a bit temperamental over the last few days) so I replaced it.  When I went back to the car to try and set the alarm it still didn't work.  I then tried to start the car but nothing.  There is enough petrol in the car and the battery can't be flat as the interior light and hazard lights still work.  Any ideas what the problem could be?

Answer
If the alarm remotes lost programming, then it may be time
to simply replace the system after 15 years.
Trying to replace those remotes could be
most difficult.

For override, see my past answers for that.
For remove and repair/restore application
go to REMOVEALARM.com and get the notes for
it so you can take it out.

ALARMTEK

Car Alarms

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ALARMTEK

Expertise

Expertise: Questions about installing/using car alarms, auto starts, and other car security devices. I am the owner of ALARMTEK AUTO SECURITY and have been on the internet since 1994, providing online installation tech support for professional and backyard installers.

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Certification & Qualifications: 42 YEARS IN THE SAME LOCATION INSTALLING CAR ALARMS & ACCESSORIES. 4 YEARS AT DESIGNTECH INTERNATIONAL TECH SUPPORT DESK - NOKIA TECH COURSE-AAMP & BISHOP ELECTRONIC CERTIFICATES, SKY TRACK 12 VOLT GLOBAL POSITIONING-PRODUCT INSTALLATION-APPLICATION/MASTER CERTIFICATION COURSE & MORE!

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SCHOOLS & GRADUATED PROGRAMS INCLUDE: CELLULAR ONE QUALITY CONTROL-BELL ATLANTIC MOBILE-IMTL- SILVER LEVEL MECP-HONDA/TOYOTA SECURITY APPLICATION SPECIALIST. PASSLOCK BYPASS SPECIALIST.

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