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Old 06-07-2010, 03:35 PM   #1
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not sure where to put this

how do i wire fog lites to the battery? i know dumb question

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Old 06-07-2010, 03:47 PM   #2
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you want to run new wiring and new switch? (clarification)

If so

simple.

One wire (should be fused) to the battery, other end to pos lead of fog light.

one wire to a ground, then to one side of switch, 3rd wire from switch to other lead of foglight.

You CAN switch ground or power. I prefer to switch ground, so all the power isn't going through the switch...dunno why, but it sounds better to me.

I'm tired and only 40% of my brain is functioning right now so if this doesn't make sense you'll know why...

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Old 06-07-2010, 03:55 PM   #3
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haha thats ok i got every thing connected but the battery the fuse wire has a prong thing on it and i was wondering if i should just put it on the bolt that goes across the wires or on the + nub of the battery
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Old 06-07-2010, 03:58 PM   #4
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Switch will be passing the same amount of current whether switching the ground side or the positive side. The current draw of the lights will dictate the capacity of the switch (amperage). Also the size of the wire. The resitance of the wire (greater with smaller wire) will cause the wire to heat some and will reduce the voltage (and brightness) of the lights. Best bet is to switch a relay which has much more direct connections between the battery and the lights.
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Old 06-07-2010, 04:00 PM   #5
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how do i go about doing that?
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Old 06-07-2010, 04:19 PM   #6
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It adds a slight bit to the complicatedness (is that a word? it is now)...and adds another point of failure. (relays go out.)

Personally for something that isn't going to get used very often (like most people's offroad lights.) I keep it simple. So simple in my case that I kept OEM wiring and just limited my lights to 55w... once my OEM switch dies I'll change it.

for 80% of offroad lights don't ever get used. those that do, 99% get used rarely.

Note those %'s are not fact. They are rough estimates.


BUT having said that you can do the relay route. I can't easily explain it w/o drawing a diagram...and I suck at drawing, so I'll let someone else post up a pic of a diagram for relay activated lights.

Might google images: "accessory fog light wiring" "Fog light wiring diagram" , "off road light wiring diagram

But yes, you can power the wire directly from the battery cable's bolt.

There's at least 11 ways to skin a cat. and more than one is "correct". this is also true with wiring, depending on which "expert" you listen to. (I'm not the expert in question.)
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Old 06-07-2010, 04:22 PM   #7
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well it has a relay box so is that wht it is?
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Old 06-07-2010, 04:29 PM   #8
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all i need is a way to hook up the red wire to the battery
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Old 06-07-2010, 04:40 PM   #9
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Auto part store will have a relay for the application.
Run a large wire from battery to the lights with the relay in the circuit. Run a smaller gauge wire from either the battery or other 12v source, even through your ign switch to the relay coil connection. In this case switching the ground side you only have to run a single wire from the switch to the relay coil ciruit, but you do have to run the other contact on the switch to ground in the vicinty of the switch.

Picture shows running directly off battery. Different circuit to run off of the ignition switch.
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Old 06-07-2010, 04:53 PM   #10
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hmmm ok but how do i go about connecting the wire to the battery
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Old 06-07-2010, 05:11 PM   #11
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A crimp on connector with a ring size to match the bolt stud on the battery connector.
If you are new to this, I would suggest talking to someone who has some experience, even the counter reps at the local auto parts store. What wattage are your lights? Sound like they came with some form of relay. Where there instructins packed with the lights?
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Old 06-08-2010, 11:42 AM   #12
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broke the switch
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Old 06-08-2010, 01:09 PM   #13
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they are easily replaced.

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