Wiring fog lights through factory wiring - JeepForum.com

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post #1 of 17 Old 07-21-2013, 05:19 PM Thread Starter
Alexf7019
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Wiring fog lights through factory wiring

I am getting rampage driving lights tomorrow and my plan is to cut the wire right behind the factory wiring harrness and just rewire the positive and negative into my new light but I'm wondering if I can do this any help is good

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post #2 of 17 Old 07-21-2013, 05:37 PM
grnd93
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Yes
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post #3 of 17 Old 07-23-2013, 10:54 PM
mattman998
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That's exactly what I did, no problems at all. If you want it a little cleaner you can cut it on the lights side of the harness and leave the connector in place.
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post #4 of 17 Old 07-30-2013, 09:31 PM
jpdriver1
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Originally Posted by mattman998 View Post
That's exactly what I did, no problems at all. If you want it a little cleaner you can cut it on the lights side of the harness and leave the connector in place.
I ran a separate harness for the fogs and light bar, but used the factory wiring to trigger the relays -- that way they only come on when the headlights are on and turn off when the high beams are activated

1989 metric tonne comanche, 4.0L, 5 sp trans, reciever hitch, double tube light bar, d30 front, d44 rear, alloy wheels, goodyear wranglers -- his name is snydley (as in whiplash)
1990 metric tonne comanche, 4.0L jeep speed motor, 5 sp trans, 2 in lift, d44 rear, d30 front -- her name is jenny
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post #5 of 17 Old 07-31-2013, 02:56 PM
LA-Sahara
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Depends what wattage they are. If 55w, I'd say go for it. I used a relay just incase.
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post #6 of 17 Old 07-31-2013, 10:54 PM
Zdrisko
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Originally Posted by LA-Sahara View Post
Depends what wattage they are. If 55w, I'd say go for it. I used a relay just incase.
And if they're 100w?
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post #7 of 17 Old 08-01-2013, 02:02 AM
grnd93
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Originally Posted by Zdrisko

And if they're 100w?
100w fog lights?
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post #8 of 17 Old 08-01-2013, 05:23 AM
Zdrisko
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100w fog lights?
Hella 4000
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post #9 of 17 Old 08-01-2013, 07:56 AM
LA-Sahara
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Originally Posted by Zdrisko View Post
And if they're 100w?
Well stock were 55w, and the wires were even small for that. 100w would be too much power for the wires and switches to handle. I would just run a relay and trigger it with the stock fog wire. (Actually, that's what I did )
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post #10 of 17 Old 08-01-2013, 09:03 AM
Zdrisko
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Originally Posted by LA-Sahara View Post

Well stock were 55w, and the wires were even small for that. 100w would be too much power for the wires and switches to handle. I would just run a relay and trigger it with the stock fog wire. (Actually, that's what I did )
That's what I figured.
Now.. build my own or buy Hellas $70 harness? :banghead:
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post #11 of 17 Old 08-01-2013, 09:11 AM
LA-Sahara
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If you know what you are doing, building a harness is easy and could possibly be done for only $20.
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post #12 of 17 Old 08-01-2013, 02:37 PM
grnd93
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Quote:
Originally Posted by Zdrisko

Hella 4000
Are not fog lights.

You would be hard pressed to find a fog light over 55w
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post #13 of 17 Old 08-01-2013, 03:37 PM
Zdrisko
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Originally Posted by grnd93 View Post

Are not fog lights.

You would be hard pressed to find a fog light over 55w
Oooooook? Fogs, driving. .. how about AUXILIARY lights ..
True fogs have yellow lenses.
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post #14 of 17 Old 08-01-2013, 03:45 PM
Zdrisko
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Originally Posted by LA-Sahara View Post
If you know what you are doing, building a harness is easy and could possibly be done for only $20.

After more research, a mechanic told me today that factory automobile wiring must withstand twice it's rated capacity. Normally I would have thrown the b.s. flag but he seemed quite positive with his statements. Afterwards we checked the numbers against factory bulb sizes for '02 Sport and found they're H1 55W and H1 100W. Confirming what he had said.
Though I'm not discounting anyone's information here, I believe I'll green light the factory wiring and switch while holding my breath. Thanks LA Sahara!
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post #15 of 17 Old 08-01-2013, 04:45 PM
LA-Sahara
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Good luck with it. I've always seen the electrical geniuses on here say that the stock wiring is barely enough for factory fogs.
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