motion sensor wiring 2 wires
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=127305
Printed Date: May 15, 2024 at 12:29 AM
Topic: motion sensor wiring 2 wires
Posted By: evis
Subject: motion sensor wiring 2 wires
Date Posted: May 12, 2011 at 8:22 AM
Make: Ford
Model: Ranger
Year: 2004
Alarm: Visteon (original Ford install)
I have a motion sensor on my dash with two wires. The sensor does not activate the alarm. One of the wires are grounded (screwed into the bodywork in the footwell), whilst the other wire is dangling loose (no copper visible outside of the sheath, as if the wire was cut clean-off).
What should this second wire be connected to? Can I crimp onto the internal door light switch (which also sets off the alarm)?
Replies:
Posted By: evis
Date Posted: May 12, 2011 at 8:44 AM
To add to the above, the Burglar Alarm Unit has the following written on it:
BL2A 67 791
2K21A
Naldec 34111 42
(I believe that Naldec are now a part of Visteon?)
Posted By: howie ll
Date Posted: May 12, 2011 at 5:06 PM
Yes but trunk trigger is a better option via an inline (1N4004) diode, band towards the join.
I also very much doubt if it's a motion sensor with two wires, more likely to be a simple tilt sensor.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: May 12, 2011 at 5:08 PM
I also suggest you contact Ford customer service or Google the info.
I just don't think it's any sort of sensor with just two wires.
Also beware on a US site, the US ranger is a Ford and completely different from our Mazda made model.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: evis
Date Posted: May 13, 2011 at 4:23 AM
Thanks for the reply howie II. Below is a picture of the sensor in question. Is this not a motion sensor?
For customer service is absolutely useless so no help there :(.
Posted By: evis
Date Posted: May 13, 2011 at 1:04 PM
Some more information:
The door light switches (which activate the alarm) are usually NO, the alarm activates at NC. But each switch has a ground and positive...
I tried the following:
1. Connecting both wires together to the ground (i.e. screwed to the chassis). This didn't do anything.
2. Connecting one wire to the ground, and the other to the door light switch. The green LED on the sensor lit up, however when I made a noise or moved around, the alarm didn't activate.
3. As above, but changed the wires around. This didn't do anything.
Posted By: howie ll
Date Posted: May 13, 2011 at 1:25 PM
It simply means that the switches themselves aren't grounded, that "12V+" is the switched ground return for the courtesy (dome) lights.
That's the only wire to connect to but I don't believe it's a sensor if so it would have had at least three wires, ground (earth), power and trigger or 2 trigger wires for inner and outer zones and it's probably a shock or tilt sensor definitely NOT a prox the alarm wasn't sophisticated enough.
You're barking up the wrong tree time to bin it.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: May 13, 2011 at 1:27 PM
It could even be half of an ultrasonic detector with two wires the other half is missing!
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: evis
Date Posted: May 14, 2011 at 4:04 AM
I would much prefer a shock sensor, and it could be one with just 2 wires, yes?
I have an Electrical Wiring Diagram for my vehicle, however it doesn't make any reference to such a sensor, or at least I cannot see a reference!
Posted By: howie ll
Date Posted: May 14, 2011 at 4:15 AM
Not available with two wires you're obviously not reading or taking in previous posts.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: evis
Date Posted: May 14, 2011 at 1:11 PM
howie ll wrote:
Not available with two wires you're obviously not reading or taking in previous posts.
Have I miss understood what you mean by "...or 2 trigger wires for inner and outer zones and it's probably a shock or tilt sensor..."
Posted By: howie ll
Date Posted: May 14, 2011 at 2:36 PM
ALL shock, prox. or tilt sensors have a minimum of 3 wires or 4 if dual zone. Anything with two is either a glass break mic or half of an ultrasonic pair, in which case with both the cable would be coax.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: evis
Date Posted: May 15, 2011 at 5:58 AM
If it is an ultrasonic detector, what would the other half look like? I wonder whether that's what the wire has been pulled off?
Posted By: howie ll
Date Posted: May 15, 2011 at 6:02 AM
You do realise your wasting your time with this don't you?
You won't get any spares, circuit diagrams, etc.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: oldspark
Date Posted: May 15, 2011 at 6:31 AM
It looks like a reflective beam system - ie, an IR LED and detector which can be wired as a 2 wire system.
But in that case, scrap it. What is going to reflect the LED? And there needs to be processing smarts....
Get another detector....
Posted By: evis
Date Posted: May 16, 2011 at 2:31 AM
Thanks for the responses fellas. Looks like it was just there for show in that case.
Are there any shock sensors which can be wired into the existing alarm? Or would that require an aftermarket alarm?
Posted By: howie ll
Date Posted: May 16, 2011 at 2:41 AM
Finally, could have saved your self a lot of time and my patience.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
|