help !using relay to config. door trigger
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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=6742
Printed Date: August 26, 2025 at 6:50 PM
Topic: help !using relay to config. door trigger
Posted By: redline
Subject: help !using relay to config. door trigger
Date Posted: December 15, 2002 at 5:58 PM
My problem is- from the alarm system it has a positive and neg. wire input for the door trigger, but my neg. wire door trigger is not working. anyone know how i can use the positive wire input to trigger a neg.door output with a relay
Replies:
Posted By: webguy
Date Posted: December 15, 2002 at 8:58 PM
If your pin switch at the door is not working, then you have no way to activate a relay. Your best bet would be to replace/repair the pin switch. If that is not an alternative, then You could install a magnetic switch in the door jamb......Just don't use a magnetic switch to directly turn on any interior lites. Magnetic switchs do not like current loads. You can use the magnetic switch to trigger a relay, which could then be used for both your interior light and alarm trigger. I took the diagram from the relay page and modified it for this purpose: (assuming that your factory interior lite is a negative trigger) 
Just a thought.......... ------------- Clean tools = Clean work!
Posted By: Velocity Motors
Date Posted: December 15, 2002 at 9:18 PM
Hey webguy, I think Redline was saying that his (-) trigger on his alarm wire was not working and he needs to use a reverse polarity diagram to convert the (-) trigger wire from the car to a (+) output so that he can use the (+) input wire off his system. If I am right here is what you need to do ( but if I'm wrong, please tell me and I will correct this post ): Go to this link : https://www.velocitymotorsport.com/install_notes/Converting_Outputs.jpg and use the NEGATIVE INPUT------> POSITIVE OUTPUT Diagram ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: webguy
Date Posted: December 15, 2002 at 9:42 PM
I guess "redline" will have to clarify what he meant by his "trigger not working". Alas, the woes of technical writing! Either way, one of us should be able to get him in the right direction. He'll just have to come back and reiterate...... By the way, I just checked out your Velocity Install at your website. Pretty trick! ------------- Clean tools = Clean work!
Posted By: Velocity Motors
Date Posted: December 17, 2002 at 2:03 AM
Thanks !! If Redline comes back, please update your installation and let us know how you made out.
-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: redline
Date Posted: December 17, 2002 at 6:35 PM
Jeff ,this is exactly what i meant. thanks for the information and thanks your guys for the helping, i appreciated.
Posted By: webguy
Date Posted: December 17, 2002 at 7:14 PM
Good call, Jeff! ------------- Clean tools = Clean work!
Posted By: Velocity Motors
Date Posted: December 18, 2002 at 12:44 AM
No problemo... if for any reason any of the members think that the information that I have is incorrect, please tell me. It's better to second guess the information and see a mistake that I have made, then let someone take wrong advise and damage something or worse, hurt someone. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
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