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Most all alarm systems have various sensors for detecting such things as vibration, heat and or movement around your vehicle and so forth. If these sensors are set to sensitive and or are defective the alarm system will be more of a nuisance than a deterrent. , EzForJesus

PS if this is an OEM type of alarm you might want to contact your dealer for this information.

There are 2 sensors which you have to be aware of. One is under the hood and one is in the trunk. My trunk sensor was sticking and the alarm was intermittently going off at all times during the day and night. I disconnected the trunk sensor and the car has functioned normal ever since. I bought an electrical wiring diagram for my car and figured it out.

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โˆ™ 2015-07-14 15:05:03
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Q: Why would the alarm go off randomly in your 2001 Mercury Sable?
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