leds to go on with dome light and switch

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=121443
Printed Date: June 01, 2024 at 2:37 AM

Topic: leds to go on with dome light and switch

Posted By: bombsquad91
Subject: leds to go on with dome light and switch
Date Posted: April 20, 2010 at 7:57 PM

I put LED's in my headliner. I want them to go on when the dome light goes on and I also want to be able to turn them on with a switch. How can I have the LED's go on with the switch without the dome light going on? I've included 2 diagrams to explain my point. Am I wrong in thinking that the dome light will go on with the switch?
posted_image

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".....um, is that wire hot?"

Replies:

Posted By: oldspark
Date Posted: April 20, 2010 at 9:33 PM

Just like your other thread - insert a diode where you want the "one-way" action. (As stated - a common 1N4004 etc should be fine. It is rated for 1A and thus handles probably up to 50 parallel (strings of) LEDs. So to will the higher numbers like IN4007 etc.)

Presumably your door switch is hot (switches +12V) - many are a single terminal switch to ground.

Posted By: bombsquad91
Date Posted: April 21, 2010 at 5:36 PM

Thank you.

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".....um, is that wire hot?"

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