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Old 07-13-2010, 10:45 AM   #1
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HID Harness

I'm about to buy some H11 6000k HID bulbs for the fog lights on my 2009 focus

I'm getting them from ddmtuning.com, am I gonna need the HID Harness if I'm getting them for the fog lights?

and what does the HID harness do?

Thanks.


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Old 07-13-2010, 12:53 PM   #2
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I dont quite understand what an HID harness is lol? Is it the part that u connect to the ballast and theres a fuse with a relay and u connect to the battery?? If thats it then i dont think u will need it unless u want it. I have one but thats because my car didnt come with fogs so i added them and made then work whenever i turn on my headlights. But the hids should be just plug and play.
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Old 07-13-2010, 10:24 PM   #3
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I think what you're referring to is the HID relay harness. Correct me if i'm wrong, but I believe it allows the regular stock headlight harness to set off the relay, so that power can be drawn straight from the battery, vs the stock harness. Its useful for cars like my focus that have DRLs, and are unable to supply adequate/constant current to startup the HID's properly.
I think it also can protect your stock harness if too much current is drawn? (although HID's should be drawing less current, right?)
I dont think its required for cars without DRL.
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Old 07-13-2010, 10:38 PM   #4
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The wiring harness that came with my ddm hid kit got frayed, so i plan on ordering one of these.

http://www.ddmtuning.com/Products/HI...Wiring-Harness
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Old 07-13-2010, 11:27 PM   #5
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Quote:
Originally Posted by LTL0540 View Post
I think what you're referring to is the HID relay harness. Correct me if i'm wrong, but I believe it allows the regular stock headlight harness to set off the relay, so that power can be drawn straight from the battery, vs the stock harness. Its useful for cars like my focus that have DRLs, and are unable to supply adequate/constant current to startup the HID's properly.
I think it also can protect your stock harness if too much current is drawn? (although HID's should be drawing less current, right?)
I dont think its required for cars without DRL.
Yeah it's a good idea to run the harness...I know some guys aren't though. Just a safety precaution to keep from burning up your stock harness
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Old 07-14-2010, 08:01 AM   #6
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so if I'm gonna be putting HIDs on my fog lights, am I gonna need the HID harness?
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Old 07-14-2010, 05:10 PM   #7
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Bascially its up to u. I dont have a harness on my headlights and i have had HIDs in them for a few years without any problem. I have the relay harness on my fogs because my car didnt come with fogs so i hooked it up to where they come on with the running lights. So its up to u.
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Old 07-14-2010, 05:32 PM   #8
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Originally Posted by FocusFreak09 View Post
Bascially its up to u. I dont have a harness on my headlights and i have had HIDs in them for a few years without any problem. I have the relay harness on my fogs because my car didnt come with fogs so i hooked it up to where they come on with the running lights. So its up to u.
Yeah I agree...I would run one just to be safe....when you first turn on your HIDs they draw ALOT of voltage. There's a chance you can burn up your harness. Just a safety precaution.
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Old 07-14-2010, 05:51 PM   #9
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HID's will NEVER burn up your OEM harness!! they burn at the same wattage or less.

the only reason for the HID harness that DDM offers is in case the OEM harness isnt supplying the ballasts with the wattage they need. thus taking it from the battery.
HID's burn at 55w and 35w. take a multi-meter and see how much wattage the OEM connecter sees. if its 55w, you dont need the harness. normal halogens also burn at 55w.

I KNOW WHAT IM TALKING ABOUT!

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Old 07-14-2010, 06:44 PM   #10
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I'm running the harness for piece of mind. Plus the fuse protection is a bonus if anything ever shorts out.

Totally up to you my friend.
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