Crazy Alarm
Thread Starter
Intermediate
Joined: Jun 2013
Posts: 29
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From: Lufkin Texas
Crazy Alarm
My 2003 Anniversary Edition's alarm goes off when there has been no attempt to defile my princess. It may go 3 to 4 weeks before it goes off and it may blast every 30 minutes. My temporary fix is to go into DIC and turn off the lights and then pulled the fuse for the horn. I've Googled the issue, but none of their circumstances are similar to mine (other than going off). The battery is fully charged, nothing is wet, it happens even when the fob is a half a mile away. Suggestions?
Team Owner
Joined: Jul 2006
Posts: 22,190
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From: Kannapolis NC
Maybe you've got the same situation as another post on here a few days ago where the neighbors fob for a non-Corvette was setting off his "panic" function intermittently. One other possibility would be that your door switch may be showing the door coming open when it's not, I guess. If it did it more often, you could leave the doors unlocked so as not to arm the alarm and see if it still goes off. If so, it's receiving a signal to set off the panic sound. If it only happens with the doors locked, it's associated with the security portion.
Thread Starter
Intermediate
Joined: Jun 2013
Posts: 29
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From: Lufkin Texas
Safety Car
Joined: Dec 2011
Posts: 4,704
Likes: 239
From: Redondo Beach CA
hope this is an easy problem to fix.
I have some bad habits and tend to put off non essential repairs until I feel like working them out. If you share my style I can provide some extra motivation to attend to this small problem more quickly, like a jockey with a whip, if the true experience below is helpful.
I don't know how you park your ride, but I used to live in an area dense with apartments. An unknown neighbor left for a long week end and their car alarm failed, it sounded and would not go off. The police were called, I don't know exactly why they were unable to help, but they said they were powerless. That car had a good battery, because it didn't let up. After days and nights of solid alarm, the car fell silent, but didn't look too good when I walked down past the car and checked it out. It was covered with eggs that had been thrown, generously , and a side window was broken. I don't know if the window was to shut off the alarm, or just general bad sportsmanship, but I wouldn't want your corvette to get close to that kind of thing, I think egg damage can be real bad once the protein cooks in the sun. You scared straight now kid? ( a small attempt at humor)
I have some bad habits and tend to put off non essential repairs until I feel like working them out. If you share my style I can provide some extra motivation to attend to this small problem more quickly, like a jockey with a whip, if the true experience below is helpful.
I don't know how you park your ride, but I used to live in an area dense with apartments. An unknown neighbor left for a long week end and their car alarm failed, it sounded and would not go off. The police were called, I don't know exactly why they were unable to help, but they said they were powerless. That car had a good battery, because it didn't let up. After days and nights of solid alarm, the car fell silent, but didn't look too good when I walked down past the car and checked it out. It was covered with eggs that had been thrown, generously , and a side window was broken. I don't know if the window was to shut off the alarm, or just general bad sportsmanship, but I wouldn't want your corvette to get close to that kind of thing, I think egg damage can be real bad once the protein cooks in the sun. You scared straight now kid? ( a small attempt at humor)
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
If you want to try that so you bypass the switch to trick the system to think the door is always closed I can provide the info. You could do one door at a time to see if one of them may be the cause.
I hope it is not a random act of "kindness" from the BCM in the sleep mode.
Thread Starter
Intermediate
Joined: Jun 2013
Posts: 29
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From: Lufkin Texas
Not at home now but the door switch for the alarm (and door open chime) is in the latch. I helped someone who had a switch issue that would cause the chime to sound when the door was actually closed. As a temp fix I gave him info on which pin to pull in the A-pillar or at the BCM. That easier than removing the door panel in the short term.
If you want to try that so you bypass the switch to trick the system to think the door is always closed I can provide the info. You could do one door at a time to see if one of them may be the cause.
I hope it is not a random act of "kindness" from the BCM in the sleep mode.
If you want to try that so you bypass the switch to trick the system to think the door is always closed I can provide the info. You could do one door at a time to see if one of them may be the cause.
I hope it is not a random act of "kindness" from the BCM in the sleep mode.
Team Owner
Joined: Jul 2006
Posts: 22,190
Likes: 4,178
From: Kannapolis NC
It's not really "alarm" sensors. It's the door open sensors that think the door is open when it shouldn't be. I'm not convinced from your info that the sensors are causing your problem. You said sometimes it blasts for 30 minutes. The alarm resets before that. Is it a steady horn blast, or honks with flashing lights? If steady, you may have the fairly common horn membrane problem. If the other, you may be picking up a frequency that just happens to match your "panic" button frequency on your fob.
Last edited by 65GGvert; Dec 4, 2014 at 08:40 AM.
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Le Mans Master
Joined: Mar 2011
Posts: 6,835
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From: Columbia SC
I don't think the door switches are the issue but I wanted to provide the info. Horn membrane is a good possibility. I have heard of the horn going off just due to temperature changes with a bad membrane.
Thread Starter
Intermediate
Joined: Jun 2013
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From: Lufkin Texas
Thanks
Race Director
Joined: May 2012
Posts: 15,766
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From: Phoenix area, AZ
Something similar to this happened on an '03 Monte Carlo that I used to own. The only fix for it was to replace the entire airbag assembly as it was the airbag cover contracting in the cold that was setting the horn off.
Last edited by Corvette_Ed; Dec 8, 2014 at 05:29 PM.
Team Owner
Joined: Jul 2006
Posts: 22,190
Likes: 4,178
From: Kannapolis NC
Thread Starter
Intermediate
Joined: Jun 2013
Posts: 29
Likes: 0
From: Lufkin Texas
It's not really "alarm" sensors. It's the door open sensors that think the door is open when it shouldn't be. I'm not convinced from your info that the sensors are causing your problem. You said sometimes it blasts for 30 minutes. The alarm resets before that. Is it a steady horn blast, or honks with flashing lights? If steady, you may have the fairly common horn membrane problem. If the other, you may be picking up a frequency that just happens to match your "panic" button frequency on your fob.
Team Owner
Joined: Jul 2006
Posts: 22,190
Likes: 4,178
From: Kannapolis NC
Definitely sounds like the alarm. A stray signal wouldn't cause the alarm to go off like that, it could trigger the "panic" function though. If the alarm sounds when the car isn't locked, I think the panic function is being activated, either by external signal or a malfunction in the car's computers. If it only happens when the door is locked, it could be either alarm or panic.
