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I have a 2010 EX with the stock alarm. 117k mi. Car has been perfect since I bought it used at 37k a bit over five years ago; it's been a daily driver since then, until a week and a half ago.

Mid-day today the alarm started going off randomly while sitting parked in my driveway--six or seven times during the afternoon. I hit unlock on the remote fob to silence it and then LEAVE IT UNLOCKED and it still goes off.

As the car had been parked for several days. I thought it might be related to battery issues, so in the late afternoon I started it--no problem at all starting--and drove it around for 45 minutes or so. The false alarm did not repeat; I chalked it up as random.

Then, just after midnight, it woke me (AND I AM SURE SOME OF MY NEIGHBORS!). It went off three more times as I searched this forum and typed this entry. I'll go down and disconnect the battery for tonight, I guess, but I would welcome any and all help.

HEEELLLLLLPPPP!

Thanks in advance, folks.
 

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I would have your 12v battery properly load tested.

Just because you were able to start and drive it for 45 minutes doesn’t mean the battery is OK. When you drive it the charging system helps keep the car alive. If you have an older battery that is starting to have issues the drive won’t necessarily fix it. A battery with voltage drop issues could be the problem.

HTH,
Scott
 

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Discussion Starter #3
I would have your 12v battery properly load tested. [...] A battery with voltage drop issues could be the problem.

HTH,
Scott
Thank you, Scott -- The battery is about 4 years old, so I'll have it checked out promptly.
 

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Indeed, the 12volt underhood batteries in these cars only seem to last about 3 years. Weird things happen when they get weak.
 

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Indeed, the 12volt underhood batteries in these cars only seem to last about 3 years. Weird things happen when they get weak.
The original 12v battery was 3-4 years old when I replaced it; the replacement (now 4 or 5 years old) was mid-level aftermarket. I would not have expected it to decay this soon.
 

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It has nothing to do with battery quality, but how the 12 volt battery is charged and used. There is no alternator to charge it directly and it almost never starts the car. There are specific reasons these batteries die early, but I am not the one to explain it, so I won’t. (It irritates those who really know)
 

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I had a note on my Insight from security at work that my alarm keeps going off. I had my battery checked and it was fine.

There is a common problem with many Hondas that the hood latch switch goes bad. Anything, even a temperature change, can then set off the alarm. You can clean, replace the switch, or simply disconnect the switch.

I disconnected my hood latch switch and have had no false alarms since. The door alarms still work fine.

 

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Ours is doing the same thing, we had our battery tested and it is fine. No one seems to know what is causing it. removing the battery cables is the only fix we found so far.
 

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Car Alarm randomly goes off

Yes,
We checked it yesterday and we could not find any sensor, looked in the manual and no mention of it. Is there a sensor in the 2010 Insight and if so, where would it be? We also checked the interior lights and could not find a sensor. The interior lights look almost molded into the ceiling of the car.
 

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The stock alarm is really simple. The "sensor" such that it is is just the door switches that turn the interior lights on & off. Those do get mangled sometimes. Same thing with the hood latch. It is just going to be a couple of wires running to that hood latch. If you find them, they can be wired together to fool the system into thing the hood is really latched. Probably not worth replacing that latch.
 
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