2001 Jetta - Shock Sensor addon question

So I picked up a DEI 504 shock sensor to add to my factory alarm on my 2001 Jetta.. Looks like this:

Followed the instructions from:

http://www.swankmonkey.com/motion_sensor

The 504 sensor has 4 wires:

Red - PowerBlack - GroundBlue - Trigger 1 (-)Green - Trigger 2 (-)

So I connected the Blue and green wires together using a diode in line of the blue wire (prevents current going back into the module). That single wire was then "tapped" into the "BROWN / Red" wire of the Comfort Control Module harness. The Red wire was tapped into the RED / Black constant power wire of the same harness. The black was grounded to a ground point under the dash.

Seemed to hook everything up fine. Go to close the doors a set the alarm. I jiggle the sensor and its LED light lights up but NOTHING ELSE HAPPENS! NO ALARM! I prop the door open and the alarm goes off, but not from the sensor.  :confused:

What happened? Am I using the wrong sensor? Do I need one with a "+" trigger wire? A relay? I evened tried using an Audiovox sensor my friend has. It had 3 wires (red, black, green) and the same thing happened. . . The LED lit up when we shook it, but no alarm.  :banghead:

Someone please help!

which direction duo u have the diodes facing?? is there a hood switch on the car??Good Luck

David

Ace Security

813-376-9778

Tampa

Donate to the 12volt

draasch wrote: which direction duo u have the diodes facing?? is there a hood switch on the car??

I don't remember off hand, but we did try just hooking up the Green wire without any diode (no blue wire). The Hood switch wire is supposed to be the BROWN / Red wire on the harness.

first test the hood wire and make sure you have the right one....try hooking up the blue wire...the green one most of the time is for pre-warn trigger....the blue one is the instant triggerGood Luck

David

Ace Security

813-376-9778

Tampa

Donate to the 12volt

draasch wrote: first test the hood wire and make sure you have the right one....try hooking up the blue wire...the green one most of the time is for pre-warn trigger....the blue one is the instant trigger

Well, do you know if the trigger wire has to be a Positive or Negative Trigger? Remember, I tried using an AudioVox shock sensor (Single stage with 3 wires) and it did the same thing. I'm assuming it had a negative trigger as well. . .

Thanks for your help so far. .

well most alarms use a neg trigger...however, if your using a hood switch, you should be able to test the hood switch and find out the polarity of the switch.... see how many wire are attached to the switch..most of them are of the grounding type..Good Luck

David

Ace Security

813-376-9778

Tampa

Donate to the 12volt

it's rather pointless for you to connect the green wire of your shock sensor at all, since what you're triggering is the factory alarm. the factory alarm receives a negative pulse to its hood pin it will just plain start sounding as it normally would. as draasch has said, you really need to make sure that the BROWN / red wire you've found is indeed the hood pin wire. another thing you may wish to consider is that the negative pulse coming from the shock sensor may not be strong enough or long enough. feed the signal through a relay to give a true ground signal....that may help. also, you may have to wait for some time (like around a minute or so) after you've armed the factory alarm before you try to trigger it. good luck!

Were you successful in adding your 504 sensor? I have the same sensor and was wondering why 1 screw for 2 zones. Do you have the instructions sheet for it? I bought mine off ebay and received nothing but the sensor and the harness/wires. I want to adjust the 2 zones differently. If nobody knows the answer to this, I will have to figure out something myself. THanks Mark

I haven't done this, but am interested in addind a microwave and a shock sensor to my 2000 Jetta... I googled around and found a link on a howto, it looks very simple to do...enjoy. http://www.swankmonkey.com/motion_sensor/ Good Luck, --Lito