Question about 1991 Cadillac DeVille

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Can the alarm drain my battery and is there a kill switch for the alarm?My car won't start but it's a brand new battery in it. When I open the door the alarm goes off for a while then stops. I don't have an alarm key. It wont start with a jump either.

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  • paul roofer johnson
    paul roofer johnson Jun 29, 2012

    I have a 1988 coup deville and i am having the EXACT same problem.. The car will not start after the alarm goes off because the alarm disables the starter all yu have to do is dissconnect a battery terminal then put it back on and the will start right up... So what i am trying to figure out is how do i dissable the stock alarm completly?.. Can anyone helf me with this?!...

  • Anonymous May 09, 2016

    Try using your door key and locking then unlocking your driver's door. That should reset your alarm.

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The remote control for the electric door locks should disable the alarm just lock it then unlock it, try that it might work

Posted on Jun 01, 2010

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The Alarm system will do several things to disable the car from starting. It will reduce the voltage to the starter to prevent the engine from turning over. Some will even kill the ignition system so that if the starter is jumped, the car still won't start.

The Battery saver will disconnect any system to prevent discharge below a minimum threshold. Unfortunately, when the Alternator is working extra hard to charge a really bad battery: it will disconnect the charging circuit because it reads the Draw going to the Alternator to produce the power as a parasitic drain. Even at 70mph I have seen the charging disconnected and the vehicle coast to a stop when the electric runs out.

The last system worth mentioning is the Starter interlock. Under the dash and at the top of the Brake pedal lever is a switch. When you press the brake pedal, the switch allows the starter to crank provided the shifter is not in D or R. Drivers feet routinely hit this switch and either move it or break it. When it breaks it can short and drain the battery.

As you mentioned a Random problem, the Brake switch can shake to create a random problem if it is loose or broken. Your rear brake lights can be affected.

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I had a new Lincoln myself which set off the Alarm randomly. I actually slept inside the car one night so I could turn off the alarm in the Apartment complex parking lot. Did'nt know if it would start again if the battery was disconnected and then reconnected. The Battery was shorted with less than 1000 miles on the car. It was a factory defective battery less than 3 months old.

But your car has many years and miles on it so it was worth mentioning the wear items. I hope my solution is helpful.

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One of those buggers is draining your system, you have to find it and kill it.
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Good luck my friend, hope it is helpful.

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