Strange security system issues?
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
Strange security system issues?
Recently horn has been going off when just sitting in driveway, sporadically. Also, sometimes when I drive, the locks cycle, especially when I hit bumps, sometimes just constantly.
I had to pull fuse on the horns I just fixed and replaced so it doesn't keep going off and kill battery.
Very annoying, any ideas what the cause could be?
thanks
I had to pull fuse on the horns I just fixed and replaced so it doesn't keep going off and kill battery.
Very annoying, any ideas what the cause could be?
thanks
Race Director
Joined: Oct 2005
Posts: 11,769
Likes: 175
From: Rolla Missouri
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Yes, the door switches.
The security system relies on knowing if the doors are open or closed.
Those door switches give it that information.
The locks cycling when you hit bumps is another indication of the switches being out of adjustment or not making electrical contact
The security system relies on knowing if the doors are open or closed.
Those door switches give it that information.
The locks cycling when you hit bumps is another indication of the switches being out of adjustment or not making electrical contact
Last edited by RollaMo-LT4; Nov 21, 2016 at 02:31 PM.
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
I checked the switches, but will check again and lube them.
No, stock system. I will try disabling too.
It seems I had this years ago, but don't recall what happened... I remember the switches, but not sure if that was it at the time.
No, stock system. I will try disabling too.
It seems I had this years ago, but don't recall what happened... I remember the switches, but not sure if that was it at the time.
Race Director
Joined: Mar 2015
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Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
I checked the door switches, and pulled them all the way out. I didn't realize the little plunger in the main push button also can come out more. I closed doors, and of course they pushed in, but I guess that is way to keep them adjusted just right.
Battery was dead again, so charging now. Will see if it works once charged.
Battery was dead again, so charging now. Will see if it works once charged.
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
I thought there was a difference as well as to how you locked the car at least on a '91 as in use the switch on the door panel vs. the key from outside or just pushing the slide back by hand. There is so much info out there that sometimes agrees and sometimes contradicts it gets hard to keep it straight.
Race Director
Joined: Mar 2015
Posts: 15,926
Likes: 579
I checked the door switches, and pulled them all the way out. I didn't realize the little plunger in the main push button also can come out more. I closed doors, and of course they pushed in, but I guess that is way to keep them adjusted just right.
Battery was dead again, so charging now. Will see if it works once charged.
Battery was dead again, so charging now. Will see if it works once charged.
might want to load test the battery.
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
Now the light says Door Ajar when they are closed. Pulled out the plungers but no go.
The security light keeps flashing, and if I hold down fob button locks cycle, but only open, not to lock, and lights stay on, and can't seem to get PKE activated. I had to disconnect battery.
So it seems like the door switches are not working correctly and telling the system the doors are closed.
Any suggestions?
The security light keeps flashing, and if I hold down fob button locks cycle, but only open, not to lock, and lights stay on, and can't seem to get PKE activated. I had to disconnect battery.
So it seems like the door switches are not working correctly and telling the system the doors are closed.
Any suggestions?
Drifting
Joined: Mar 1999
Posts: 1,784
Likes: 80
From: Detroit
Now the light says Door Ajar when they are closed. Pulled out the plungers but no go.
The security light keeps flashing, and if I hold down fob button locks cycle, but only open, not to lock, and lights stay on, and can't seem to get PKE activated. I had to disconnect battery.
So it seems like the door switches are not working correctly and telling the system the doors are closed.
Any suggestions?
The security light keeps flashing, and if I hold down fob button locks cycle, but only open, not to lock, and lights stay on, and can't seem to get PKE activated. I had to disconnect battery.
So it seems like the door switches are not working correctly and telling the system the doors are closed.
Any suggestions?
Last edited by RIC96; Nov 26, 2016 at 10:00 AM.
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
Odd thing is door light didn't come on until after I messed with the switches. Security and PKE were working until battery died and I recharged. I am thinking the same as you RIC96, one or both of the door switches are dead or on last leg.
Drifting
Joined: Mar 1999
Posts: 1,784
Likes: 80
From: Detroit
Recently horn has been going off when just sitting in driveway, sporadically. Also, sometimes when I drive, the locks cycle, especially when I hit bumps, sometimes just constantly.
I had to pull fuse on the horns I just fixed and replaced so it doesn't keep going off and kill battery.
Very annoying, any ideas what the cause could be?
thanks
I had to pull fuse on the horns I just fixed and replaced so it doesn't keep going off and kill battery.
Very annoying, any ideas what the cause could be?
thanks
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
If the horn was going off when you were parked in the driveway with the alarm activated, the door switches were the logical assumption. I focused on the fact that the door locks were "cycling" while you were out driving around. If you open and close the door when the ignition is running, the system will automatically unlock the doors to make sure you don't lock your keys in the car. If the doors are already unlocked it will still "try" to unlock them. That might be caused by a bouncing door switch. This is in contrast to the locks "cycling" as they do when you activate the PKE. In this case when you hold the button on the fob the doors will lock and then unlock, indicating the system is now active or inactive. Which symptom were you seeing when driving around? In any event you need to fix the failing or maladjusted door switch before troubleshooting the original problem.
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
Now that you mention, this seems familiar, maybe I messed with the switch years ago, I recall doing something around that area and trying to keep something from falling down. IDK so many projects over the years on 2 Vettes.
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
Found a video. Like I mentioned, pretty sure I did this years ago, as I recall having this issue, and working on the door. I guess I replaced and fixed the issue. I am going to work on it more and see if it can be fixed, if not I will buy a switch and hope that fixes issue. I guess it is most likely the drivers door since that is used 99% more than passenger side.