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Dome Light wire in with switch help

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bugs825

Joined: Dec 24 2007
Posts: 81
Location: Florida


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Post Sat Jun 06, 2009 5:58 pm

I got the stuff for this project a while ago and I am just now getting around to doing it. I have a bunch of LEDs around the outside of the car that I want to come on with the dome light (so that they glow when the keyless entry buttons are pushed). I also need a lighted rocker switch so that they can be turned on while the car is parked. However, I don't want the dome light to come on when the switch is turned on. Just the LEDs.

The dome light is a dimming light and is negetive switched. I am a residential electrician but this stuff is very different. Here is what I have come upo with.
[url][/url]

Thanks so much
Nathan
A-Ray

Joined: May 01 2005
Posts: 4062
Location: Volunteer State


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Post Sat Jun 06, 2009 11:04 pm

I'm no expert when it comes to these things, but I am pretty sure that you are going to want/need a relay for this to work properly.
PwrRngr

Joined: Jul 19 2007
Posts: 4407


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Post Sun Jun 07, 2009 6:38 am

What you have will work. It's simply two switches in parallel w/ a diode (what you have drawn).
byte

Joined: Mar 25 2009
Posts: 313


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Post Sun Jun 07, 2009 7:14 am

This should work for you using two diodes.

http://www.the12volt.com/diodes/diodes.asp



I forgot to label the diodes on the pic icon_sad.gif

The website above has good wiring diagrams for relays as well.
PwrRngr

Joined: Jul 19 2007
Posts: 4407


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Post Sun Jun 07, 2009 7:34 am

^^^
What's the purpose of the second diode (the one next to the rocker switch)?
byte

Joined: Mar 25 2009
Posts: 313


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Post Sun Jun 07, 2009 8:57 am

PwrRngr wrote:
^^^
What's the purpose of the second diode (the one next to the rocker switch)?


Opps... the second diode is not needed... Thanks for pointing that out icon_smile.gif
bugs825

Joined: Dec 24 2007
Posts: 81
Location: Florida


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Post Sun Jun 07, 2009 9:55 am

Awesome. So my next question is which way is down stream. Which way will the silver band on the diode face???
bugs825

Joined: Dec 24 2007
Posts: 81
Location: Florida


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Post Sun Jun 07, 2009 9:58 am

bugs825 wrote:
Awesome. So my next question is which way is down stream. Which way will the silver band on the diode face???


scrap that. I just clicked the link. Lots of good info. Thanks a bunch.

Nathan
JSewell

Joined: Mar 22 2009
Posts: 464
Location: Texas Raised


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Post Mon Jun 08, 2009 12:03 pm

beautiful diagram

i ended up drawing the exact design ha
bugs825

Joined: Dec 24 2007
Posts: 81
Location: Florida


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Post Fri Jun 12, 2009 3:06 pm

ok new question.

I got everything wired in and all works great except for one thing. Being that the dome light is negatively switched, I had to wire the LED rocker to make and break the negitive. Then, I connected the third connector to a positive source to light the LED inside the rocker. the switch functions properly but it will not light. icon_cry.gif

Is the LED inside not polarity reversable??? My wife loves the LEDs but is bummed that the led won't light like the other one for inside the car. Anyone know???

Thanks and pics will be up soon,

Nathan
BLAZER_97

Joined: Apr 10 2007
Posts: 1565
Location: Decatur TX


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Post Sun Jun 14, 2009 12:48 am

hook the rocker up backward. i did it , worked for me
bugs825

Joined: Dec 24 2007
Posts: 81
Location: Florida


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Post Mon Jun 15, 2009 7:58 pm

I did that and the switch works fine but the LED will not light. I'll have to double check it again.

Nathan
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