tilt sensor for trunk
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=101556
Printed Date: July 13, 2025 at 11:28 PM
Topic: tilt sensor for trunk
Posted By: audioman2007
Subject: tilt sensor for trunk
Date Posted: January 25, 2008 at 1:13 PM
I was reading an old post about someone wanting to put a tilt sensor for their hood. The topic was closed so i couldnt reply. I got an idea for putting a tilt sensor in my trunk, placing it on the underside of the trunk lid. This would work 2 ways. 1. If someone was to use a crowbar to open my trunk, as soon as the trunk lid would start to open, the tilt sensor would trigger the alarm. 2. If someone was to jack up my car to steal my rims or whatever, the tilt sensor would trigger the alarm. I can pop my trunk using aux 1 on my remote. I have my alarm programed to disarm the alarm when i press aux 1. Would putting the tilt sensor in my trunk work? Thank you
Replies:
Posted By: usabuilt
Date Posted: January 25, 2008 at 1:18 PM
You have to be carefull with tilt switches when parking on hills, pin switches or hooking up to factory light in trunk is a better way to monitor the trunk IMO.
Posted By: audioman2007
Date Posted: January 25, 2008 at 4:21 PM
I have a mercury switch in my trunk and already tried wiring up to the light. Had no luck. Anyways, hills shouldnt cause a problem for the tilt sensor since the degree on the sensor isnt set until you arm the car (atleast from what I read). So if you park on a level road, when you arm the alarm the tilt sensor will remember say 0 degrees and will only sound if the degree is changed 1-3 degrees depending on how you have it adjusted. Same goes for a vehicle that is parked on 30 degrees. Please correct me if I am wrong. I was just thinking that if I would install one of these sensors on the underside of my trunk lid, both my car and my trunk itself would be protected. I was thinking about installing a hood pin switch instead, but with a tilt sensor, I cover both basis.
Posted By: KarTuneMan
Date Posted: January 25, 2008 at 8:58 PM
What a pain in the A getting that thing set up.
-------------
Posted By: usabuilt
Date Posted: January 26, 2008 at 11:51 AM
Sorry I misread what you were saying, by tilt I thought you meant a mercury switch, I doubt very much a theif could pry open your trunk with a crow bar, usually they would punch out the lock which should set off the shock sensor, and if it does not it should go off when the truck is opened anyway.
I haven't put a tilt switch in a long time.
But you could put a shock in the trunk if you really want it to be more sensitive in that area, and this should also help to cover the rear wheels assumming you put wheel lock on them.
Posted By: audioman2007
Date Posted: January 26, 2008 at 12:50 PM
So would it be a good idea to put a tilt switch on the underside of my trunk? It would protect my trunk from being opened plus protect my car from being jacked up. I do have a dual stage shock sensor BUT I had problems with it giving off false alarms. No matter how I adjusted it, it would either be way too sensitive or wouldnt be sensitive period. So what I did was cut the blue trigger wire. So now all the shock sensor does is give off pre warn chirps. I had ordered an air pressure sensor which has 2 sensors each having 8 feet of cord. I will put one for my trunk and one in the car. I also have a glass break sensor which I will be installing plus I want to get a microwave sensor but just use the pre warn exterior part. I know this sounds like alot of sensors, having multiple sensors covering 1 part of the car. But you never know, 1 sensor might fail. I heard that shock sensors dont work if you use a special object to break the glass. The air pressure sensor might not work. Its better to be extra safe than not to have enough. I have just 1 question. Lets say I have 3 sensor triggers dioded to 1 trigger input. Lets say 2 of those sensors go off at the same time. The negative current from those 2 sensors wont fry my brain since they both go to the same trigger input would they?
Posted By: usabuilt
Date Posted: January 26, 2008 at 12:55 PM
sheesh dude, what you got some diamonds in your car :)..your alarm seeing 2 grounds at the same time will not damage anything, but it could make some false alarms hard to diagnose.
Posted By: audioman2007
Date Posted: January 26, 2008 at 1:09 PM
Let me ask you something..... If your car got broken into, would you seriously keep driving that vehicle? I know I wouldnt, knowing someone out there has broken into it. Yes you are correct that diagnosing would be hard. But I have a solution. Each power wire from each sensor will have its own fuse and then from there go into 1 wire with a fuse.
Posted By: audioman2007
Date Posted: January 28, 2008 at 3:28 PM
So would a tilt sensor on the underside of my trunk lid work?
|