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Old 01-06-2013, 01:20 PM   #1
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How to install 12volt grill lights

I got some LED grille lights for Christmas, and now I need to install them. They come with a switch, but I'm sort of thinking I'd like them to just always come on with headlights, rather than a separate switch.

I have a 2002 Jeep.

Several questions:

1) Is this a bad idea to just have them always on with headlights? If I do this, do I just splice in to the headlight power switch, or what?

2) If I do end up using the switch, this will be my first switch. I don't have a light bar, although I do want to get one in the future (probably a year off). So if I end up wiring a switch in, I want to make sure I do it in such a way that I don't cause issues in the future.

3) If wired with the switch, can you recommend what I'd connect to for the 12volt power supply?

The only "electrical" work I've ever done is to install the stereo in my jeep. Feel free to talk to me as if I'm an idiot on this stuff... I just want some suggestions.

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Old 01-06-2013, 01:26 PM   #2
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What color are the LED's? Are there any laws in your area preventing the color of the LED's? WV won't let you have any flashing or colored lights on your vehicle other than factory

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Old 01-06-2013, 05:40 PM   #3
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Oh that's crappy! they are not flashing, they're a black-light LED, I've seen other people driving with them so I'm assuming they are okay but I will check it out to confirm. Thanks for the heads up.
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Old 01-06-2013, 09:05 PM   #4
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Yeah it's pretty crummy. The easiest 12v connection would be the positive side of the battery. This is what my KC light wiring harness recommended. I prefer the switch over hard wiring in. It allows you to switch them on even if you lights are out.
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Old 01-06-2013, 09:12 PM   #5
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What do the lights look like.
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Old 01-08-2013, 09:36 AM   #6
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Originally Posted by WVU Mountainman View Post
Yeah it's pretty crummy. The easiest 12v connection would be the positive side of the battery. This is what my KC light wiring harness recommended. I prefer the switch over hard wiring in. It allows you to switch them on even if you lights are out.
So, to be clear -- you have the rocker switch on your dashboard, and the power source is just connected to the positive terminal? That won't cause any battery drain unless it's on, right?
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Old 01-08-2013, 09:38 AM   #7
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What do the lights look like.
Here's a link: LED Grille Light Kit | PlasmaGlow
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Old 01-08-2013, 09:44 AM   #8
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I'd click on the Live Support hot chick.
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Old 01-08-2013, 09:57 AM   #9
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I'd click on the Live Support hot chick.
So what are the odds I'll get HER on the other end of tech support?
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Old 01-08-2013, 10:22 AM   #10
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I have "grill lights". Its not like that though.
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Old 01-08-2013, 11:24 AM   #11
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So, to be clear -- you have the rocker switch on your dashboard, and the power source is just connected to the positive terminal? That won't cause any battery drain unless it's on, right?
You run the power source from the battery to the rocker switch, then to the lights. It only drains the battery when its on. I would recommend a lighted rocker switch, that way you don't forget to turn it off. I wouldn't tap into the HL switch without knowing the legality of your state. Hooking it up separately from the HL switch will give you the option to turn it off manually if there's a 5.0 around.
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Old 01-08-2013, 12:23 PM   #12
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Even though it a low amp draw, I'd use a relay. If you use an ignition source to power the switch the lights will always turn off when you turn the Jeep off. Plus your not snaking one long continuous wire from the battery, into the cab, and back out to the lights.

Check radioshack, they sell cheap spdt micro relays.
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Old 01-09-2013, 11:53 AM   #13
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You run the power source from the battery to the rocker switch, then to the lights. It only drains the battery when its on. I would recommend a lighted rocker switch, that way you don't forget to turn it off. I wouldn't tap into the HL switch without knowing the legality of your state. Hooking it up separately from the HL switch will give you the option to turn it off manually if there's a 5.0 around.
Makes sense.... I have reviewed the laws in my state (texas) and believe I am in good shape as long as it's not flashing, red or blue, but never hurts to be careful.
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Old 01-09-2013, 12:16 PM   #14
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Just make sure where every you hook up battery or fuse box. Install a fuse to make sure if you get some kind of short you don't end up with wire melting and a fire
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Old 01-26-2013, 01:37 PM   #15
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Thanks for all the advice. I have all my gear, I have a fuse and all connectors... now. Where the hell do you go through the firewall on a TJ? Do I really have to drill a hole? I just assumed there would be a place to go through. Any suggestions?

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