dei 508d
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=137395
Printed Date: November 04, 2025 at 12:23 AM
Topic: dei 508d
Posted By: benutzername20
Subject: dei 508d
Date Posted: October 06, 2014 at 10:31 PM
Hello,
I want to add a DEI 508D motion sensor to an Avital 5303L, which already has a Stinger Double-Guard shock-sensor. The shock sensor only connects 3 wires to the brain (red, black and blue. Green is not utilized by default, as the sensor apparently uses a pulse duration to differentiate the stages).
My question is can I tie the 508D into the unused green wire going into the brain? My wiring for the 508D would be: Red to my own 12V source (not using the brain for power), black to GWA, and then how do I proceed with the blue and/or green wires? I was hoping to avoid removing the existing harness to add diodes to the shock sensor harness.
Do I need to use a relay when grounding the 508D through the GWA (.5A) circuit? Nothing else is connected to the GWA circuit.
Thanks so much!
Replies:
Posted By: howie ll
Date Posted: October 07, 2014 at 2:45 AM
You are absolutely right, don't use a relay it shouldn't be needed, also it will drain your battery.
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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: benutzername20
Date Posted: October 07, 2014 at 3:07 PM
howie ll wrote:
You are absolutely right, don't use a relay it shouldn't be needed, also it will drain your battery.
Thank you for the reply. I'll do it that way.
How would you connect the 508's blue and/or green wires to the existing system?
Posted By: howie ll
Date Posted: October 07, 2014 at 4:31 PM
Use the 508d plug the join the two blues, but diode separate them in line 1N4004 bands away from alarm/RS
-------------
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: benutzername20
Date Posted: October 07, 2014 at 6:31 PM
howie ll wrote:
Use the 508d plug the join the two blues, but diode separate them in line 1N4004 bands away from alarm/RS
Sounds good - thank you. Is there a way to instead utilize the currently unused green wire on the shock sensor circuit?
Posted By: howie ll
Date Posted: October 08, 2014 at 1:04 AM
Not sure.
-------------
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: benutzername20
Date Posted: October 08, 2014 at 2:23 AM
howie ll wrote:
Not sure.
Fair enough. :) Thank you for all of your help!
Posted By: catback
Date Posted: October 08, 2014 at 10:05 AM
You can connect to the unused green going into the avital if you desire. The blue and green sensor input of the avital are functionally the same.
Posted By: benutzername20
Date Posted: October 08, 2014 at 10:16 AM
catback wrote:
You can connect to the unused green going into the avital if you desire. The blue and green sensor input of the avital are functionally the same.
Awesome - thank you! Does it matter which wire on the 508 (blue or green)I connect to the green wire on the Avital?
Posted By: catback
Date Posted: October 08, 2014 at 10:28 AM
benutzername20 wrote:
catback wrote:
You can connect to the unused green going into the avital if you desire. The blue and green sensor input of the avital are functionally the same.
Awesome - thank you! Does it matter which wire on the 508 (blue or green)I connect to the green wire on the Avital?
Both although you can try either if you desire - not sure if the 508D multiplexs the output like the shock sensor does.
Posted By: benutzername20
Date Posted: October 08, 2014 at 10:39 AM
catback wrote:
benutzername20 wrote:
catback wrote:
You can connect to the unused green going into the avital if you desire. The blue and green sensor input of the avital are functionally the same.
Awesome - thank you! Does it matter which wire on the 508 (blue or green)I connect to the green wire on the Avital?
Both although you can try either if you desire - not sure if the 508D multiplexs the output like the shock sensor does.
I'll play around with it once it arrives. Thank you again!
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