varad-like led scanner hookup

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=37273
Printed Date: May 09, 2025 at 11:32 PM

Topic: varad-like led scanner hookup

Posted By: timmay
Subject: varad-like led scanner hookup
Date Posted: August 12, 2004 at 9:03 PM

hey guys,

i just purchased this "batman" light from ebay. https://cgi.ebay.com/ebaymotors/dll?ViewItem&rd=1&item=7913697930 (comparable to varad's gothic light)

there is 3 wires coming out of it (ground, positve and a yellow wire)

i hooked up the ground and the positive and the led came on right away. I was under the impression that this light will only come on if there is a negative ground going into the yellow wire. Is it supposed to come on when just ground/pos are hooked up?

Thanks in advance

Replies:

Posted By: auex
Date Posted: August 12, 2004 at 10:44 PM

Ground to ground, positive to Constant +12V, and yellow to something that goes to ground when car is off or ground when armed to alarm. It does appear that it is supposed to light up only if the yellow wire sees a ground. But I suppose this is what you get for getting it from ebay.

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Posted By: timmay
Date Posted: August 12, 2004 at 10:47 PM

auex]G wrote:

ound to ground, positive to Constant +12V, and yellow to something that goes to ground when car is off or ground when armed to alarm. It does appear that it is supposed to light up only if the yellow wire sees a ground. But I suppose this is what you get for getting it from ebay.

thanks auex!!

would connecting the black wire to my accesory output on my alarm give me the effect that i want?

and where would i have to put a diode?

thanks in advance!

Posted By: auex
Date Posted: August 12, 2004 at 10:49 PM

Well, I think you should put a diode in between the alarm and starter kill on the ground when armed wire and hook the led to the between the diode and alarm. This way it would light up when the alarm is armed. As for accessory output, if you do this then it will only do light up when the channel is active.

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Posted By: timmay
Date Posted: August 12, 2004 at 11:00 PM

would this diagram work?

how can i hook up a switch so that i can turn on the led when the car is running?

i imagine hooking another diode and a lead to ground should do the trick..not to sure on how to implement that tho
posted_image

Posted By: auex
Date Posted: August 12, 2004 at 11:04 PM

Yup that is it. You have to remember to include the file type for images to show up, like for you led.jpg.

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Posted By: timmay
Date Posted: August 12, 2004 at 11:08 PM

how would i wire a switch into that diagram so that i can turn on this led when the car is running?

Posted By: auex
Date Posted: August 12, 2004 at 11:15 PM

Just wire another diode in where you connect the led to the ground when armed wire. Then wire a toggle switch in between the diode and the led.

Like this
posted_image

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Posted By: timmay
Date Posted: August 12, 2004 at 11:21 PM

thanks so much auex!!!

any way i can rate you or anything?

Posted By: auex
Date Posted: August 12, 2004 at 11:28 PM

Nope, don't need it. Just here to help.

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.