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Building an upgraded headlight harness

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Old 10-23-2009, 07:29 PM   #1
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Building an upgraded headlight harness

Maybe I'm an idiot and just can't find it. I thought I'd build a heavy duty headlight harness instead of buying one from suvlights.com for 73.00 plus 15 shipping.. Seems very straight forward and relatively easy, although I can't figure out what exactly I need to do with the whole switched-ground nonsense.

I'd greatly appreciate any help.
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Old 10-23-2009, 10:52 PM   #2
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why exactly do you want to do this? are you loosing voltage between your battery and light harness? i know when i checked mine years ago, there was no loss?
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Old 10-28-2009, 07:17 PM   #3
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voltage checked

Just got a chance to check tonight. Am showing no loss in voltage at all. 14.16 volts at battery and the same at the headlight.
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Old 10-28-2009, 08:46 PM   #4
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Voltage isn't the problem, it's the amps/watts that might fry your factory harness.
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Old 10-28-2009, 08:55 PM   #5
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the amps/watts of OEM H4 bulbs are going to fry the harness, this is the first i am hearing of this....

i've read of people using these upgraded harness cause they believe they were losing voltage to their bulbs, therefore they would upgrade to increase output to its maximum. which is why i asked the OP the purpose of the upgrade. if he's still using OEM bulbs, and there is no voltage loss to the bulbs, why upgrade? spend the money elsewhere...like saving for a projector retro!!
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Old 10-28-2009, 10:36 PM   #6
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How about these from Roger Brown?

http://4crawler.com/4x4/CheapTricks/...OnLineOrdering

edit: oops, the H4 harnesses seem to be out of stock.
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Old 10-28-2009, 11:21 PM   #7
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^, but again, why? if hes getting the same voltage at the lights as he is at the battery, what possibly could an upgraded harness do for him?!
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Old 10-29-2009, 05:04 AM   #8
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Using Silverstar Ultra bulbs. No increased wattage to the harness. I've been using Silverstars for a few years now and see no melting of the harnesses yet. Since I see no melting and no voltage drop, I'm with Yosh, why do it.
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Old 10-29-2009, 09:19 AM   #10
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Quote:
Originally Posted by viperstd View Post
to support running 100W bulbs?
nope, see above...
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