circuit open light on?

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=104220
Printed Date: May 14, 2024 at 3:49 AM

Topic: circuit open light on?

Posted By: eddiec
Subject: circuit open light on?
Date Posted: April 23, 2008 at 9:05 PM

Is there a way to wire a light so that it will come on when a circuit is open and off when the circuit is closed?

Replies:

Posted By: KPierson
Date Posted: April 23, 2008 at 9:36 PM

Yes.

An easy way would be to use a relay. When the circuit is open the relay won't be energized. When the circuit is closed the relay will be energized.

More information about what you are trying to do might lead to a better answer.

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Kevin Pierson

Posted By: eddiec
Date Posted: April 23, 2008 at 10:10 PM

Sorry, I will explain. I have an old jeep that has a lot of its original wiring missing. I am trying to get the backup lights to work. The wiring diagram looks simple enough. Red wire from switch to hot in run. White with tracer from switch to backup lights. The only problem: when I wire it up, the lights are on in every gear BUT reverse. First I thought maybe the switch was bad but the new switch is the same way. I thought maybe I missed something but thats it. How would I wire a relay like that?

Posted By: eddiec
Date Posted: April 23, 2008 at 10:58 PM

Thanks for pointing me in the right direction. Using the information on the relay page I was able to figure it out. posted_image

Posted By: eddiec
Date Posted: April 24, 2008 at 10:42 PM

Is it possible that a single throw relay can have two 87 pins?

Posted By: KPierson
Date Posted: April 25, 2008 at 5:54 AM

Yes, they make them with two 87 pins.

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Kevin Pierson