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Old 09-11-2010, 07:57 AM   #1
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New fog lights question

Quick question. I am thinking about replacing my old fog lights and I am wanting to add the KC 100 watt fog lights. My question is can I use the old fog lamp wiring harness or is the 100 watts too much and I need to use the wiring kit that came with the fog lights and run new wires?

Thanks,

Rick
Lawrence, KS

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Old 09-11-2010, 08:37 AM   #2
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I did the same upgrade w/o any problems, using the existing set-up.

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Old 09-11-2010, 10:46 AM   #3
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That probably would work,but the stock ones have 55 watt bulbs.Since you are close to double that,I would at minimum use the stock wiring to activate a relay and pull power straight off the battery.The O.E.M. wiring wasn't built for such a load,and even though it might work fine,over time it would likely deteriorate and melt wiring.Better safe than sorry!
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Old 09-11-2010, 02:06 PM   #4
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That probably would work,but the stock ones have 55 watt bulbs.Since you are close to double that,I would at minimum use the stock wiring to activate a relay and pull power straight off the battery.The O.E.M. wiring wasn't built for such a load,and even though it might work fine,over time it would likely deteriorate and melt wiring.Better safe than sorry!
Definetly use relays.
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Old 09-11-2010, 05:52 PM   #5
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Use a relay and heavier wire to the lights, don't chance a melt down and possible fire. I'd buy some replacement fogs and use them as fogs. Buy some driving lights and install them properly, remember though 100 watt lights in most states need to be covered when not off roading. Then may not check but if they do it's a hefty fine.
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Old 09-12-2010, 07:52 AM   #6
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Thanks for the info. I'll rewire the new lights instead of using the old wiring harness. Thanks for all the replies.

Rick
Lawrence, KS
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Old 09-12-2010, 08:06 AM   #7
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Relay Wiring Diagram

Not sure if you need this but this should give you some guidence.
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Old 09-14-2010, 05:12 PM   #8
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i know nothing about wiring. im curious as to why everything has to be grounded? so many grounds in one single circuit?
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Old 09-14-2010, 05:42 PM   #9
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I rewired my headlights and foglights separate because when you turn in your brights the stock fogs turn off. Personally on the trail at night I want the option to have them all on.
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Old 09-14-2010, 09:37 PM   #10
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@TroyD-grounds need to be less than 12",therein lies the reason for multiple grounds.Never a good idea to run 1 long continuous ground.Ground big fat short and often is a good rule of thumb!
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Old 09-15-2010, 07:54 PM   #11
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I rewired my headlights and foglights separate because when you turn in your brights the stock fogs turn off. Personally on the trail at night I want the option to have them all on.

There is a way to defeat the fog lites going off when the hi beams are turned on. There has been numerous articles on the forum on how to do it.
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Old 09-15-2010, 08:18 PM   #12
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There is a way to defeat the fog lites going off when the hi beams are turned on. There has been numerous articles on the forum on how to do it.
And it's much easier than rewiring everything.

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Old 09-15-2010, 08:36 PM   #13
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And it's much easier than rewiring everything.

Donn

You still should rewire due to the wattage being twice as much.
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Old 09-15-2010, 08:56 PM   #14
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x2!
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Old 09-15-2010, 09:27 PM   #15
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thanks for the info Gold
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Old 09-15-2010, 09:31 PM   #16
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You still should rewire due to the wattage being twice as much.
Yes..... but I was only refering to the modification to keep the factory fogs on all of the time.

Donn
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Old 09-18-2010, 04:16 PM   #17
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There is a way to defeat the fog lites going off when the hi beams are turned on. There has been numerous articles on the forum on how to do it.

Jeep Wrangler TJ Fog Lights - Enabling Their Use With High Beams

Click this link: Fog Lights
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Old 09-18-2010, 06:51 PM   #18
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There is a way to defeat the fog lites going off when the hi beams are turned on. There has been numerous articles on the forum on how to do it.
Well I did it that way because I added a second set as well as installed a floor dimmer for my brights. I had one on my 66 mustang and loved it so I went to the parts house and got one for 15 bucks. Awesome for long trips/smokers cause you don't use your hand :-D

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