faux alarm led wiring
Printed From: the12volt.com
Forum Name: Lights, Neon, LEDs, HIDs
Forum Discription: Under Car Lighting, Strobe Lights, Fog Lights, Headlights, HIDs, DRL, Tail Lights, Brake Lights, Dashboard Lights, WigWag, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=108792
Printed Date: May 09, 2025 at 10:26 PM
Topic: faux alarm led wiring
Posted By: jlazurca
Subject: faux alarm led wiring
Date Posted: November 09, 2008 at 8:33 PM
Good Day all, I am looking to install a blinking LED in a car and would like it to only work when the car is off. this asks the question how to power the unit. I found one idea on the net to use a 12v switched as a ground for the led and a live for the pos. the article says when the car is off and the switched no longer has any juice it will act as the ground for the LED. Does this sound right? Thank you everyone.
Replies:
Posted By: reax222
Date Posted: November 09, 2008 at 10:22 PM
It will change states, but I'd be very careful in which system your tying into. Anything computer controlled might not like being a ground for even as little a load as an LED. Perhaps using the power point/ cigarette lighter would work.
Posted By: reax222
Date Posted: November 09, 2008 at 10:55 PM
I don't understand what's going on, but look at this link https://www.varad.com/v4/pdf/IM-SCANNERSIgnition.pdf from varad.
https://www.varad.com/v4/pdf/IM-SCANNERSEL.pdf
These are three wire, constant, switched and ground.
Posted By: i am an idiot
Date Posted: November 10, 2008 at 9:24 AM
jlazurca wrote:
Does this sound right?
Yes, this does work, and it works well.
Posted By: jlazurca
Date Posted: November 10, 2008 at 12:16 PM
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