I have an 08 coupe. I set the alarm and every once in a while it goes off for no reason at all! No fun when it happens at 3am! Both of my key fobs were on the kitchen counter, so panic button could not have been accidentally pressed. It has also gone off by itself when I've been working in my yard and definitively know that nobody was near the car. Please help! Any suggestions appreciated! Thanks.
Factory alarm is psycho!
- Thread starter rjsrt10
- Start date
2001ViperGTS
Enthusiast
Mine used to do this as well. The alarm switch under the hood wasn't pressed down far enough when the hood was closed, so I put a few layers of tape on top of it to hold it down until I was able to take it to the dealer. Mine was still under warranty so they ended up replacing the switch and I haven't had a problem since.
Im thinking the same thing. I exercised the hood pin switch up and down several times manually about a week ago, and it hasn't done it since. But sometimes it will only act up once a month or three times a week. Thanks for the info 2001Gts. I'll start there.
ViperGeorge
Enthusiast
Seem to remember a thread about similar problems. I believe in most all of the cases it was the hood switch.
bmw2nv2000
Enthusiast
My 08 does it too. Anyone know what a new hood switch cost?
Cobraken
Enthusiast
My '09 also goes off randomly.
Wiretech
Enthusiast
You should disconnect and remove the switch first to see if it is the problem still there first.
Laundryboy
Viper Owner
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- Nov 19, 2010
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When your horn goes off, is it a continues honk or is it the on off honking of the alarm?
Wiretech
Enthusiast
When you open the hood doors trunk will sound the horn pulsing sound and will disable the fuel system also the lights will flash.
kblake905
Viper Owner
I had a similer problem. I think it was caused by having the hood open when I locked the doors from the key fob. The alarm did not go off right away....but it went off about 20 min later?
Just curious if a door switch or trunk lid switch being faulty could also be the culprit......
Just curious if a door switch or trunk lid switch being faulty could also be the culprit......
Everyone is correct regarding the hood switch. I put a small rubber boot on top of the switch to make up the difference in space. Somewhere on the forum I thought someone said the switch could be adjusted for height but I can't find it..... anyone have the link? Also keep in mind if you have multiple things in your pocket with the key fob it is possible to press and the panic button long enough to set off alarm, it happened to me once at 4AM
VicTxV10
Enthusiast
I was told it could also be the battery. 
Something about a voltage drop being detected could trigger the alarm.
Mine used to go off a lot. It got to where I would not even arm it when I was out during the day for fear it would kill the battery. I installed a new battery and it seems to have solved the problem.
Something about a voltage drop being detected could trigger the alarm. Mine used to go off a lot. It got to where I would not even arm it when I was out during the day for fear it would kill the battery. I installed a new battery and it seems to have solved the problem.
Silver04
Enthusiast
Good to know re: alarm. If mine goes off at 3AM, SWMBO will be annoyed when I "sleep through it". 
challenger&viper
Viper Owner
Give the viper wizard a call and he will tell you what to do.
I had the same problem with the alarm.
I had the same problem with the alarm.
bmw2nv2000
Enthusiast
Give the viper wizard a call and he will tell you what to do.
I had the same problem with the alarm.
Wouldnt it be alot easier for you to tell us here and save poor tator of all the phone calls on the same fix? I bet he'd appreciate it and so would we
Wouldnt it be alot easier for you to tell us here and save poor tator of all the phone calls on the same fix? I bet he'd appreciate it and so would we
Agreed. I had mine go off randomly the other day (I think). Might have just been the ultra-sensitive panic button in my pocket.
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